Question

In the below system, solve for y in the first equation.

x + 3y = 6
2x - y = 10

Answer 1

Solve for y in the first equation? The y is the same in both equations.

Answer 2

x + 2

x + 6

-x + 2

x + 2 those are my choices

Answer 3

solve for y in the first equation......ok...
x + 3y = 6 -- subtract x from both sides
3y = -x + 6 -- divide by 3
y = -1/3x + 2

Answer 4

What is the value of y in the solution to the following system of equations?

5x - 3y = -3
2x - 6y = -6

Answer 5

5x - 3y = -3 -->(-2)
2x - 6y = -6
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-10x + 6y = 6 (result of multiplying by -2)
2x - 6y = -6
-------------add
-8x = 0
x = 0
now sub 0 in for x in either of the equations to find y
5x - 3y = -3
5(0) - 3y = -3
-3y = -3
y = 1
check..
2x - 6y = -6
2(0) - 6(1) = -6
-6 = -6 (correct)

x = 0 and y = 1

Answer 6

would you do the same here?


4x - y = 3
7x - 9y = -2

Answer 7

@texaschic101

Answer 8

this one is a bit easier because it can be easily solved with substitution.
4x - y = 3
-y = -4x + 3 -- multiply by -1 to make y positive
y = 4x - 3
now just sub 4x - 3 in for y in the other equation to solve for x.
Understand ?