Предмет: Математика, автор: MarvelFin

Решите уравнение. 1. 2x+3x+ 40=90
2 (x+40)-30=50
3. 70+(60-y)=130
4.420-6x=240
5.-60:x=0,3
6. -2+y=4,3
7. 15-3x=-6
8. 180:3=x:2
9.(4x+3)*(x - 9)=0

Ответы

Автор ответа: Ксю6901
0
1)2х+3х+40=90
2х+3х=40+90
5х=130
х=26
4)420-6х=240
6х=420-240
6х=180
х=30
5)-60:х=0,3
-х=60:0,3
-х=200
х=-200
6)-2+у=4,3
у=-2+4,3
у=2,3
7)15-3х=-6
3х=15-6
3х=9
х=3
8)180:3=х:2
2х=180:3
2х=60
х=30
9)(4х+3)*(х-9)=0
7х*8х=0
56х=0
х=0
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