Question

1) 5а +2а + 400=1000;, 2) 1000 - (6а + 80) = 300;, 3) 80 + 3х = - 40;, 4) 60 : х = - 0,54, 5) 230:44 = х:88;, 6) (2+3х) - (4х - 7) = 10;, 7) 3х+2,7=0;, 8) 2х+7=3х - 2(3х-1). ПЖ

Answer 1

5а+2а+400=1000. 60:х=-0.54
7а=600. х= - 111.1111111111
а= 85.7142857143. х=-111.1(1)
1000-6а-80=300
6а= 1000-80-300
6а= 620
а= 103.3333333333
а=103.3(3)
80+3х=-40
3х= 80+40
3х= 120
х= 40
230:44=х:88
5.2272727273= х: 88
х= 460
2+3х-4х+7=10
3х-4х= 2+7-10
-1х= -1
х= 1
3х+2,7=0
3х= -2,7
х= -0.9
2х+7=3х- 6х+2
2х-3х+6х= 2-7
5х=-5
х= -1