Question

When using substitution to solve the system below, which expression can be substituted into the second equation for y. 4x+y=3 and 2x+3y=4

a. 4-2x/3
b. 3-4x
c. 4-2x

Answer 1

Can you rearrange the first equation to find an expression for y ?

Answer 2

idk how.

Answer 3

4x + y = 3
What do you get when you subtract 4x from both sides of this equation?

Answer 4

0+y=-1

Answer 5

4x + y = 3
Subtractin 4x from both sides gives
4x - 4x + y = 3 - 4x
Can you find an expression for y now?

Answer 6

3 ?

Answer 7

4x - 4x + y = 0 + y = y = 3 - 4x
y = 3 - 4x