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x=10/3
x=3 i 1/3
b) 7x-21=2x-16
5x=5
x=1
3x=5x+10
2x=-10
x=-5
b) x-3:2=x-8:7
7x-21=2x-16
5x=5
x=1
3x = 5x+10
-2x = 10
x = -5
b) x-3/2 = x-8/7 |*14
7x - 21 = 2x - 16
5x = 5
x = 1