d)
-3 + 7*x -2=3*x-11+6*x
-3 +7x-2=3x-11+6x
7x-3x-6x= -11+3+2
-2x= -6 / : (-2)
x= 3
e)
4+5*x-2=7*x-7
4+5x-2=7x-7
5x-7x= -7+2-4
-2x= -9 / :(-2)
x= 9/2 = 4 1/2
f)
-8+7*x +3 = 5 *x +4 +4*x+5
7x -5x-4x=4+5+8+3
-2x= 20 /:(-2)
x= -10
