Question

№123
1) 8 (х-13) = 48 3) 16 (4х-26) = 224
2) 18 (х+14) = 378 4) 9 (152-7х)=927
№124
1) 11х+8х = 456 4)14x-x-28 = 224
2) 38х-14х=1608 5)8a+7a+15=420
3) y+27y=1204 6)16y-7y+38=3683

Answer 1

8(х-13)=48
8х-104=48
8х=48+104
8х=152
х=19

18(х+14)=378
18х+252=378
18х=378-252
18х=126
х=7

16(4х-26)=224
64х-416=224
64х=224+416
64х=640
х=10

9(152-7х)=927
1368-63х=927
-63х=927-1368
-63х=-441
х=7

11х+8х=456
19х=456
х=24

38х-14х=1608
24х=1608
х=67

у+27у=1204
28у=1204
у=43

8а+7а+15=420
15а=420-15
15а=405
а=27

16у-7у+38=3683
9у=3683-38
9у=3645
у=405