Name _____________________________
Common Core Algebra 9A
Date ______________________
HW #31B – Solving a system using substitution
Solve each system of equations algebraically using substitution.
1) 4x + y = -5
x + 4y = 10
3)
y = -3x + 4
-6x – 2y = -8
Mixed Review: Simplify: -2(7a + 5b) + 5(2a – 7b)
2) x = y - 1
-x + y = -1
4) 3x + 4y = -3
x + 2y = -1