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=> 3x-5x = -2-10
=> -2x = -12
=> x = -12 : -2 = 6
b) 30-5x = -2-3x
=> 30+2 = -3x+5x
=> 32 = 2x
=> 32:2 = x
=> 16 =x
c) 1/2x+2 = 3/2x-4
=> 1/2x-3/2x = -4-2
=> -2/2x =-6
=> x = 6
d) 1/3 (x+3) =1/2(x-2)
=> 1/3x +3/3 =1/2x -2/2
=> 1/3x + 1 = 1/2x -1
=> 1/3x-1/2x = -1-1
=> 2/6-3/6x = -2
=> -1/6x = -2
=> x = -2 : -1/6
=> x = -2/1 * -6/1
=> x = 12
b) 16= x
c) x = 6
d) x = 12