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2a + 10 + 5a - 2 = (2a + 5a) + (10 - 2) = 7a + 8
5a + 3 + (2a - 2) + a= 5a + 3 + 2a - 2 + a= 8a + 1
6a + 4 = 5a - 2 means that 6a - 5a = -2 - 4 which gives a = -6
5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1
-5a + b = 2 AND -a - 5b = 0 -5a + b = 2 b = 2 + 5a *using above -a - 5b = 0 -a - 5(2 + 5a) = 0 -a - 10 - 25a = 0 -26a = 10 a = 10/-26 *using 'a' value 5a + b = 2 5(10/-26) + b = 2 -25/13 -2 = -b b = 51/13 Therefore a = 10/-26 b = 51/13