Abegailsalvadorviz
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FIND THE VALUE OF X TO MAKE EACH A PROPORTION. (X+5):4=1:2

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Shinalcantaraviz
(x+5)/4 = 1/2
cross multiply 4 to the right and 2 to the left
(x+5)(2) = 1(4)
2x + 10 = 4
2x = 4 - 10
2x = -6
x = -3