Question

5x – 2y = 1
x + 3y = -7
How to solve by substitution

Answer 1

Step-by-step explanation:

substitute x for 3 and y for 7

5×3-2y=1

15-2×7=1

15-14=1

substitute y for -5 and x for 8

8+3×-5=-7

8+-15=-7