Решите уравнения.
1. 8 + 4(х – 2) = – 10 – х
2. 2( 5 – 2х) – (х + 1) =
– 6
3. 3 – 7х = – 5 ( х + 3)
1. 8 + 4(х – 2) = – 10 – х
2. 2( 5 – 2х) – (х + 1) =
– 6
3. 3 – 7х = – 5 ( х + 3)
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Answers & Comments
8+4х-8=-10-х
4х+х=-10
5х=-10
х=-2.
2). 2( 5 – 2х) – (х + 1) = – 6
10-4х-х-1=-6
-5х=-6-9
-5х=-15
х=3.
3). 3 – 7х = – 5 ( х + 3)
3-7х=-5х-15
-7х+5х=-15-3
-2х=-18
х=9.