Question

if (x +7, 8) = (10, x+y) then determine
the value of x and y

​

Answer 1

Answer:

x=y-7.8/9

y=-9x+7.8

Step-by-step explanation for x:

(x +7.8) = (10x+y)

x +7.8 = (10x+y)

x +7.8 = 10x+y

Subtract 7.8 from both sides

x+7.8-7.8=10x+y-7.8

Simplify

x=10x+y-7.8

Subtract 10x from both sides

x-10x=10x+y-7.8-10x

Simplify

-9x=y-7.8

Divide both sides by -9

-9x/-9=y/-9-7.8/-9

Simplify

x=y-7.8/9

Step-by-step explanation for y:

(x +7.8) = (10x+y)

Switch sides

(10x+y) = x +7.8

10x+y = x +7.8

Subtract 10x from both sides

10x+y-10x=x+7.8-10x

Simplify

y=-9x+7.8