Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the second equation is substituted into the first equation.

2x − 3y = −29
x + 4y = 13

A. 2(4y + 13) − 3y = −29
B.2(−4y + 13) − 3y = −29
C.2x − 3(4y + 13) = −29
D.2x − 3(−4y + 13) = −29

Answer 1

2(13-4y)-3y= -29

26-8y-3y= -29

26-11y= -29

-11y= -55

y= 5


x+4y= 13

x+4(5)= 13

x+20= 13
x= -7

answer is option B