Question

Solve the system of linear equations using either substitution or the elimination method.

y = 3x +5
X+y=1

Answer 1

x = -1

y = 2

Explanation:

x + y = 1

y = -x + 1

y = -x + 1 (Multiply this by -1)

y = 3x +5

-y = x - 1

y = 3x +5

0 = 4x + 4

4x = -4

x = -1

x + y = 1

-1 + y = 1

y = 2