a – 80 = 320 + 350
a = 350 + 320 + 80
a = 750
590 – x = 110 + 260
– x = 260 + 110 – 590
-x = -220
x = 220
x + 120 = 900 – 540
x = – 540 + 900 – 120
x = 240
480 + b = 960 – 150
b = – 150 + 960 – 480
b = 330
a – 80 = 320 + 350
a = 350 + 320 + 80
a = 750
590 – x = 110 + 260
– x = 260 + 110 – 590
-x = -220
x = 220
x + 120 = 900 – 540
x = – 540 + 900 – 120
x = 240
480 + b = 960 – 150
b = – 150 + 960 – 480
b = 330