Răspuns:
c) x=8
d) x=-3
e)x=4
Explicație pas cu pas:
c) -24(x-3)=-7(3x-9)-15
-24x+72=-21x+63-15
-24x+72=-21x+48
-24x+21x=48-72
-3x=-24
x=-24/-3
x=8
d)7(2x-2)=4(3x-3)-8
14x-14=12x-12-8
14x-14=12x-20
14x-12x=-20+14
2x=-6
x=-6/2
x=-3
e)-9(2x-4)=5(4x-8)-76
-18x+36=20x-40-76
-18x+36=20x-116
-18x-20x=-116-36
-38x=-152
x=-152/-38
x=4
