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10x-3(x-1)=4

16+24=2(2x-4)+12

4ori(2x+1)-3=81

Răspuns :

Stefiandrea3
10x-3(x-1)=4
10x-3x-3=4
7x=4+3
7x=7 /:7
x=1

16+24=2(2x-4)+12
40=4x-8+12
40=4x+4
40-4=4x
36=4x /:4
x=9

4(2x+1)-3=81
8x+4-3=81
8x+1=81
8x=81-1
8x=80 /:8
x=10

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