Question

Solve the equation for y. Then find the value of y for each value of x.

y + 2x = 5; x = -1, 0, 3.

Answer 1

What's your equation again? You need a "=".

Answer 2

Oops! I mis-did this.
y + 2x = 5; x = -1, 0, 3.

Answer 3

No worries. That's better. So, solve for y using algebra \[y+2x=5\]Simply subtract "-2x" from both sides to get\[y=5-2x\] Then substitute each separate value of x into the new equation and solve to find each corresponding value of y. For example, when x=-1 \[y=5-2(-1)\]

Answer 4

I kinda just have no idea what i am doing, this subject in my math is kickin' my arse. Thanks for any help.

Answer 5

You're welcome. When you solve an equation for a certain variable (i.e. x or y), try to get that variable alone on one side of the equation. Whenever you subtract, add, multiply, or divide, do the operation to both sides of the equation. In this case, we subtracted "2x" from both sides, so the "2x" on the left canceled out, and since there was no other "x" on the right, it simply became "-2x".