1.8(x-14)=56 2.(46-x)*19=418 3.9(143-13x)=234 4.17(5х-16)=238 1 и 2 первым способом,3и 4...

Question

1.8(x-14)=56
2.(46-x)*19=418
3.9(143-13x)=234
4.17(5х-16)=238
1 и 2 первым способом,3и 4 вторым способом

Answer 1

1)
8(x-14)=56
8x-112=56
8x=56+112
8x=168
x=168/8
x=21

2)
(46-x)*19=418
874-19x=418
-19x=418-874
-19x=-456
19x=456
x=456/19
x=24

3)
9(143-13x)=234
1287-117x=234
-117x=234-1287
-117x=-1053
117x=1053
x=1053/117
x=9

4)
17(5x-16)=238
85x-272=238
85x=238+272
85x=510
x=510/85
x=6

Answer 2

1.х-14=56:8
х-14=7
х=14+7=21
2=