1) (7x+1)-(6x+3) = 5 2) (8x+11)-13=9x-5 3)2=(3x-5)-(7-4x) 4)8x+5 = 119+(7-3x) 5)6x+(3x-2) = 14 6) 8y-(7y-142) = 51 7) 11x+103=1+(12x-31)

7х + 1 - 6х - 3 = 5 х = 5 - 1 + 3 х = 7 --------------------------------- 8х + 11 - 13 = 9х - 5 8х - 9х = -11 + 13 - 5 -х = - 3 х = 3 --------------------------------------- 3х - 5 - 7 + 4х = 2 7х = 2 + 5 + 7 7х = 14 х = 2 ---------------------------------- 8х + 5 = 119 + 7 - 3х 8х + 3х = 119 + 7 - 5 11х = 121 х = 11 ------------------------------------ 6х + 3х - 2 = 14 9х = 14 + 2 9х = 16 х = 1целая 7/9 ------------------------------------------ 8у - 7у + 142 = 51 у = -142 + 51 у = - 91 ---------------------------------------- 11х + 103 = 1 + 12х - 31 11х - 12х = - 103 + 1 - 31 - х = -133   х = 133