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2x=-3/4-3/4
2x=-6/4 /2
x=-3/2=-1 1/2
2x=-3,25-1,75
2x=4/:2
x=2
0,5(x+4)=-0,5x+7
0,5x+2=0,5x+7
0,5x-0,5x=7-2
0=5
7 + 4x = -13 / -7
4x = - 20 / :4
x = - 5
1/2x + 2 = 1/2x + 7 / *2
x + 4 = x + 7 / -4
x = x - 3 / -x
0 = -3