Ответ:
1) 7x+10=5x+2
7x-5x=2-10
2x=-8
x=-8/2
x=-4
2) 4(3x-2) +5=9
12x-8+5=9
12x=9+8-5
12x=12
x=12:12
X=1
3) 2x-5=7(3x+4) +5
2x-5=21x+28+5
2x-21x=28+5+5
-19X=38
x=38/-19
x=-2
4) 28-4(3x+2) =5(2x-7)
28-12x-8=10x-35
-12x-10x=-35-28+8
-22x=55
хз
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Ответ:
1) 7x+10=5x+2
7x-5x=2-10
2x=-8
x=-8/2
x=-4
2) 4(3x-2) +5=9
12x-8+5=9
12x=9+8-5
12x=12
x=12:12
X=1
3) 2x-5=7(3x+4) +5
2x-5=21x+28+5
2x-21x=28+5+5
-19X=38
x=38/-19
x=-2
4) 28-4(3x+2) =5(2x-7)
28-12x-8=10x-35
-12x-10x=-35-28+8
-22x=55
хз