Question

-10x + 3y = 5
x = y - 4

Answer 1

Y=5

Explanation:

-10(y-4) +3y=5

-10y+40+3y=5

-7y+40=5

-40 -40

-7y=-35

y=5

Answer 2

x = 1

y = 5

Explanation:

Substitute x = y - 4 into -10x + 3y = 5

-7y+40=5

Solve for y in -7y + 40 = 5

y = 5

Substitute y = 5 into x = y - 4

x = 1

Therefore

x = 1

y = 5