A,,2x+x=100,,B,,30x-7x=50-3x,,C,,40x-50+7=3x-2x,,D,,7(x+2)=10,,E,,10(2x+5)=100 me ajudem
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A,,2x+x=100,,==> 3x = 100 ==> x =100/3
B,,30x-7x=50-3x,,==> 30x-7x+3x=50 ==> 26x=50==> x= 50/26
C,,40x-50+7=3x-2x,,==>40x-3x+2x= 50-7==> 39x=43==> x = 43/39
D,,7(x+2)=10,,==> 7x+14=10==>7x=10-14==> 7x=4==>x=4/7
E,,10(2x+5)=100==> 20x+50=100==> 20x=100-50==>20x=50==>x = 50/20 ==> x = 5/2
B,,30x-7x=50-3x,,==> 30x-7x+3x=50 ==> 26x=50==> x= 50/26
C,,40x-50+7=3x-2x,,==>40x-3x+2x= 50-7==> 39x=43==> x = 43/39
D,,7(x+2)=10,,==> 7x+14=10==>7x=10-14==> 7x=4==>x=4/7
E,,10(2x+5)=100==> 20x+50=100==> 20x=100-50==>20x=50==>x = 50/20 ==> x = 5/2
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