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