11.Решите уравнение
1)5(x-4)=x+8
2)9-7(x+3)=5-6x
3)(7x+9)-(11x-7)=8
4)3,6+5y=7(1,2-y)
5)0,4(6-4 t)=1,9-0,5(3 t-7)
1)5(x-4)=x+8
2)9-7(x+3)=5-6x
3)(7x+9)-(11x-7)=8
4)3,6+5y=7(1,2-y)
5)0,4(6-4 t)=1,9-0,5(3 t-7)
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Answers & Comments
1. 5х-20=х+8
4х=28
х=7
2. 9-7х-21=5-6х
-х=17
х=-17
3. 7х+9-11х+7=8
_4х=-8
х=2
4. 3,6+5у=8,4-7у
12у=4,8
у=0,4
5. 2,4-1,6т=1,9-1,5т+3,5
-0,1т=3
т=-30
1. 5x-20=x+8
5x-x=8+20
4x=28/4
X=7