срооооочно, помогите пж!!!!!. Created by ElizaVETA07Hramcova. matematika-ru

срооооочно, помогите пж!!!!!...

Vinogradik03 А) 2x-5=x+2
2x-x=2+5
X=7

В)2/5x+3/5=1/5x
2/5x-1/5x=3/5
1/5x=3/5
X=3/2

В) 0,5y-0,6=0,1y+0,2
0,5y-0,1y=0,2+0,6
0,4y=0,8
Y=2

Г) 2/3z=2/9z-4/9
2/3z-2/9z=-4/9
6/9z-2/9z=-4/9
4/9z=-4/9
Z=-1

1 votes Thanks 1

angelraide А. 2x - 5 = x + 2
2x - x = 2 + 5
x = 7

б. 2/5x + 3/5 = 1/5x
2/5x - 1/5x = -3/5
1/5x = -3/5
x = -3

в. 0,5y - 0,6 = 0,1y + 0,2
0,5y - 0,1y = 0,2 + 0,6
0,4y = 0,8
y = 2

г. 2/3z = 2/9z - 4/9
2/3z - 2/9z = -4/9
6/9z - 2/9z = -4/9
4/9z = -4/9
z = -1

0 votes Thanks 1

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