Решите пожалуйста уравнения: 1) -6(-5-7х)=-8х+2 2) 9+2(2х+1)=1 3) 4+3(10х+7)=-5 4) -4(-7+6х)=-9х-5

1) -6*(-5-7х)=-8х+2, 30 + 42x = - 7x + 2, 42x + 7x = - 30 + 2, 49x = - 28, x = - 4/7, 2) 9+2(2х+1)=1, 9 + 4x + 2 = 1, 4x = 1 - 9 - 2, 4x = - 10, x = - 2,5. 3) 4+3(10х+7)=-5, 4 + 30x + 21 = - 5, 30x = - 5 - 4 - 21, 30x = - 30, x = - 1, 4) -4(-7+6х)=-9х-5, 28 - 24x = - 9x - 5, -24x + 9x = - 28 - 5, -15x = - 33, x = 2,2