Solve by substitution

y=2x-3

-x-8y=7

Answer & Step-by-step explanation:

y = 2x - 3

-x - 8y = 7

Since, we have a equation for y, then we can substitute this equation for y to solve for x.

-x - 8 (2x - 3) = 7

-x - 16x + 24 = 7

-17x + 24 = 7

-17x = - 17

x = 1

So, since we know that x is equal to 1, then we can plug in this number for the equation of y to find y.

y = 2 (1) - 3

y = 2 - 3

y = - 1

So, the solution is (1, - 1). X equals 1 and y equals - 1.