For the following system, use the second equation to make a substitution for x in the first equation.

3x + 2y = 7

x - y + 3 = 0

What is the resulting equation?

3x-y- 3 + 2y= 7
3(y- 3) + 2y= 7
3y- 3 + 2y= 7

Question

For the following system, use the second equation to make a substitution for x in the first equation.

3x + 2y = 7

x - y + 3 = 0

What is the resulting equation?

3x-y- 3 + 2y= 7
3(y- 3) + 2y= 7
3y- 3 + 2y= 7

anonymous · Answer

From the second equation : x = y - 3
Substitute this in the first equation.

3( y - 3 )  + 2y = 7
Can you solve it now?