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a)6x+3+2(x-4)=7(x+2) b)2(2x+1)-3(3x-5)=4x-19 c)4(3x-5)+3(4x-7)=10x-13

Răspuns :

a) 6x+3+2x-8=7x+14
8x+3-8=7x+14
8x-7x=14-3+8
x=11+8
x=19

B)4x+2-6x+15=4x-19
2+15+19=4x-4x+6x
17+19=0+6x
36=6x
x=36:6
x=6

C) 12x-20+12x-21=10x-13
24x-10x=20+21-13
14x=41-13
14x=28
x=28:14
x=2