1) -6(9 - 5х)=9х + 9
-54 + 30x = 9x + 9
21x = 63
x = 3
2) -3(+4х)=-4х - 5
-12x = -4x - 5
-8x = -5
x = 0.625
3) -6(-5 - 7х)=-8х + 2
30 + 42x = -8x + 2
50x = -28
x = -0.56
4) 9 + 2(2х + 1)=1
9 + 4x + 2 = 1
4x = -10
x = -2.5
Объяснение:
1) -6(9 - 5х)=9х + 9
-54 + 30x = 9x + 9
21x = 63
x = 3
2) -3(+4х)=-4х - 5
-12x = -4x - 5
-8x = -5
x = 0.625
3) -6(-5 - 7х)=-8х + 2
30 + 42x = -8x + 2
50x = -28
x = -0.56
4) 9 + 2(2х + 1)=1
9 + 4x + 2 = 1
4x = -10
x = -2.5
Объяснение: