1)X+2=3(3x-4)
X+2=9x-12
x-9x=-12-2
-8x=-14
X=-14/(-8)
X=1.75
Проверка
1,75+2=3(3*1,75-4)
3,75=3*1,25
3,75=3,75
2)6(x-5)=-4(x+7)
6x-30=-4x-28
6x+4x=-28+30
10x=2
X=2/10
X=0.2
6(0,2*5)=-4(0,2+7)
6*(-4,8)=-4*7,2
-28,8=-28,8
1)X+2=3(3x-4)
X+2=9x-12
x-9x=-12-2
-8x=-14
X=-14/(-8)
X=1.75
Проверка
1,75+2=3(3*1,75-4)
3,75=3*1,25
3,75=3,75
2)6(x-5)=-4(x+7)
6x-30=-4x-28
6x+4x=-28+30
10x=2
X=2/10
X=0.2
Проверка
6(0,2*5)=-4(0,2+7)
6*(-4,8)=-4*7,2
-28,8=-28,8