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21-09-2016
Mathematics

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x + 7 - 4(x + 1)=10 what is the x numbers is

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DianaK3 DianaK3

21-09-2016

x+7-4(x+1)=10
x+7-4x-4=10 (expanded the brackets)
x-4x-4=3 (-7 from both sides)
x-4x=7 (added 4 to both sides)
-3x=7 (1x-4x=-3x)
x=7÷-3

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