contestada

A system of equations is given below:

y = –2x + 1
6x + 2y = 22

Which of the following steps could be used to solve by substitution?
A. 6x + 2(−2x + 1) = 22
B. −2x + 1 = 6x + 2y
C. 6(−2x + 1) + 2y = 22
D. 6(y = −2x + 1)

Respuesta :

mergl
As one equation is already solved for a variable, in this case y, A is the correct demonstration of substitution