Question

Solve the following system of equations by using the substitution method.
y = x + 3
y = 2x – 4

Answer 1

y = x + 3 ... Start with the first equation

2x - 4 = x + 3 ... replace y with 2x - 4 (since y = 2x-4)

2x - 4 - x = 3 ... Subtract x from both sides.

2x - x = 3 + 4 ... Add 4 to both sides.

1x = 7 ... Combine like terms.

x = 7 ... use the idea that 1x is the same as x


So x = 7


Now use this value of x to get the value of y. I'll let you do this part.

Answer 2

value of y is 10?

Answer 3

good

Answer 4

thanks so much!

Answer 5

you're welcome