954-78-а=277 305+х+55=1000 9*2*с=360 120:а=48:24

Question

954-78-а=277
305+х+55=1000
9*2*с=360
120:а=48:24

Answer 1

954-78-а=277876-а=277
876-277=а
а=599.
305+х+55=1000
х= 1000 -305 - 55
х = 640
9*2*с=360
18с = 360
с = 360/18
с = 20
120:а=48:24
120/а = 2
а = 120/2
а = 60