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b. x = -3
2x - 2 = 7x
-5x = 2 /:(-5)
x = -0,4
b)
10 = 4 - 2x
6 = - 2x /:(-2)
x = -3
2x+x=7+2
3x+9|:3
x=3
b) 10=4-2x
2x=4-10
2x=-6|:2
x=-3