А)
-7х=13-2(8х-7)
-7х=13-16х+14
-7х+16х=13+14
9х=27
х=3
Б)
(7х-8)-(2х-5)=17
7х-8-2х+5=17
7х-2х=17+8-5
5х=20
х=4
В)
4(14+4х)-3х=6х
56+16х-3х=6х
16х-3х-6х=-56
7х=-56
х=-8
Г)
11-5(4х-3)=4
11-20х+15=4
-20х=4-15-11 | ×(-1)
20х=-4+15+11
20х=22
х=1,1
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Answers & Comments
А)
-7х=13-2(8х-7)
-7х=13-16х+14
-7х+16х=13+14
9х=27
х=3
Б)
(7х-8)-(2х-5)=17
7х-8-2х+5=17
7х-2х=17+8-5
5х=20
х=4
В)
4(14+4х)-3х=6х
56+16х-3х=6х
16х-3х-6х=-56
7х=-56
х=-8
Г)
11-5(4х-3)=4
11-20х+15=4
-20х=4-15-11 | ×(-1)
20х=-4+15+11
20х=22
х=1,1