1)x + 34 = 76 2)238 + y = 416 3)a + 157 = 324 4)356 + b = 782
x= 76-34 y= 416-238 a=324-157 b=782-356
x=42 y=178 a=167 b=426
5)x - 546 = 216 6)206 - y = 139 7)895 - a = 513 m - 2 092 = 1 067
x=216+546 -y=139-206 -a=513-895 m=1067-2092
x=762 -y=-67 -a=-382 m=-1025
y=67 a=382