625. 3=4х+8
3-8=4х
-5=4х
х=-5\4
х=-1,25
626 -7=5х+25
-7-25=5х
-32=5х
х=-32:5
х=- 6,4
627. 9=5х+45
9-45=5х
-36=5х
х=-36:5
х=-7,2
628. 7х-7=3х
7х-3х=7
4х=7
х=7:4
х=1,75
629. 9х+ 63=-х
9х+х=-63
10х=-63
х=-63:10
х=-6,3
630. 5х-15=4х
5х-4х=15
х=15
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Verified answer
625. 3=4х+8
3-8=4х
-5=4х
х=-5\4
х=-1,25
626 -7=5х+25
-7-25=5х
-32=5х
х=-32:5
х=- 6,4
627. 9=5х+45
9-45=5х
-36=5х
х=-36:5
х=-7,2
628. 7х-7=3х
7х-3х=7
4х=7
х=7:4
х=1,75
629. 9х+ 63=-х
9х+х=-63
10х=-63
х=-63:10
х=-6,3
630. 5х-15=4х
5х-4х=15
х=15