Mathematics OpenStudy (anonymous):

solve 3x-4y=-4 over x+2y=-8 OpenStudy (anonymous):

I don't understand what's being asked. OpenStudy (anonymous):

3x-4y=-4 x+2y=-8 OpenStudy (anonymous):

there's not enough information being shown OpenStudy (shadowfiend):

That is enough information. I assume you're trying to solve for x and y. OpenStudy (anonymous):

i agree ^^ OpenStudy (shadowfiend):

So the first step in these situations is ideally to try to get one of the variables in terms of the other. In this case, we'll try to get $$x$$ in terms of $$y$$. We'll pick the second equation because it's slightly easier: \begin{align} x + 2y &= -8\\ x &= -8 - 2y \end{align} So far, so good. We can now plug in for $$x$$ in the first equation: $3(-8 - 2y) - 4y = -4$ Now we can solve for $$y$$: \begin{align} -24 - 6y - 4y &= -4\\ -24 - 10y &= -4\\ -10y &= -4 + 24 = 20\\ y &= \frac{20}{-10} = -2 \end{align} So we now know that $$y = -2$$. We can plug $$y$$ back into our equation for $$x$$ and get $$x$$: $x = -8 - 2y = -8 - 2(-2) = -8 + 4 = -4$ Now we have that $$y = -2$$ and $$x = -4$$, but, we should plug back into both of the original equations to make sure that our result matches the equations: $3x - 4y = 3(-4) - 4(-2) = -12 + 8 = -4$ That one matches. $x + 2y = -4 + 2(-2) = -4 - 4 = -8$ And so does that one. The solution is right! Hope that helps.

Latest Questions Joe348: Is it rational to replace Columbus Day with Indigenous Peoples Day?
29 seconds ago 1 Reply 0 Medals JamesTDG: If f(x) = x^2 u2013 26 and g(x) = x u2013 4, what is the domain of (StartFraction f Over g EndFraction) (x)? Show your work! I changed the equation so I can
8 minutes ago 0 Replies 0 Medals Sprinkles285: Answer the questions below. Use the rubric in the materials for help if needed. Your response should consist of three complete sentences in Spanish.
24 minutes ago 0 Replies 0 Medals kward64: ok i sung i forrogt the name of the song aready but i sung someones song and here it is https://voca.
3 minutes ago 24 Replies 0 Medals KyledaGreat: Your backpacker's guide contains a grid map of Paris, with each unit on the grid representing 0.
38 minutes ago 4 Replies 0 Medals TETSXPREME: help
35 minutes ago 2 Replies 0 Medals Noodlearms: The dashed triangle is the image of the solid triangle. The center of dilation is (6, 6).
25 minutes ago 14 Replies 1 Medal Sprinkles285: When a verb ends in -ar, -er, or -ir, you say that the verb is in the _____ form. future tense conjugated past tense infinitive
1 hour ago 3 Replies 1 Medal Noodlearms: Solve for x.
1 hour ago 14 Replies 0 Medals