### Home > CCA > Chapter 4 > Lesson 4.3.1 > Problem4-111

4-111.

Solve the systems of equations below using the method of your choice. Check your solutions, if possible. Homework Help ✎

The Substitution Method can be used to solve both of these systems.

1. $y=7−2x$
$2x+y=10$

• Substitute '$7−2x$' for $y$ in '$2x+y=10$.'

$2x+(7−2x)=10$

Solve for $x$. What do you notice about this system?

$7\ne10$

1. $3y−1=x$
$4x−2y=16$

• Follow the steps in part (a), but substitute
'$3y−1$' for $x$ in '$4x−2y=10$.'