Решите уравнение1)4х-2(х+7)=2(3-х);2)-(3у+7)=8-2(8-у);3)1.24х+3.46=1.76х+6.58;4)-2(2-5х)=2(х-3)-5;5)-4.92у-(0.08у+5,12)=-0.88-у.

Предыдущий
вопрос Следующий
вопрос

1) 4x - 2(x+7) = 2(3-x)
4x - 2x - 14 = 6 - 2x
2x - 14 = 6 - 2x
4x = 20
x = 5

2) -3y - 7 = 8 - 2(8-y)
-3y - 7 = 8 - 16 + 2y
-3y - 7 = -8 + 2y
-3y + 2y = -8 + 7
-y = -1
y = 1

3) 1.24x + 3.46 = 1.76x + 6.58
1.24x - 1.76x = 6.58 - 3.46
-0.52x = 3.12
x = -6

4) -2(2-5x) = 2(x-3) - 5
-4 + 10x = 2x - 6 - 5
10x - 2x = -4 - 6 - 5
8x = -15
x = -15/8

5) -4.92y - 0.08y - 5.12 = -0.88 - y
-5y - 5.12 = -0.88 + 0.08y
-5.12 + 5.12 = -0.88 + 5.12 - 0.08y + 5y
-0.08y + 5y = -0.88 + 5.12
4.92y = 4.24
y = 4.24/4.92
y = 0.862.toFixed(2)