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2x-6+4x+2= 6x - 4
3y-5-5y-6= - 4y - 11
-2a+2b-3a-3b= -5a + 1b
0.5t-2x+3t-x-t= 2,5t - 3x
2. = 6x - 4
3.= -2y - 11
4. = -5a -b
5. = -3x + 2,5t