Solve using the substitution method x-7y=19 5x=-2y-16

(-2,-3)

Step-by-step explanation:

subtract -7y from both sides to get x = 7y + 19

plug in

5(7y + 19) = -2y - 16

distribute the 5

35y + 95 = -2y - 16

subtract 95 from both sides

35y = -2y - 111

add -2y to both sides

37y = -111

divide both sides by 37

y = -3

plug in the y to find the x

x = 7(-3) + 19

multiply 7 and -3

x = -21 + 19

subtract

x = -2

make into a coordinate

(-2, -3)

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: