1)а) -7 + 3y = 8 - 16 + 8y3y - 8y = 8 - 16 + 7-5y = -1y = 1/5
б) 10 - 10x = 2x - 6 + 410 + 6 = 2x + 10x16 = 12xx = 4/3
в) 2x - 4(x + 7) = 6 - 3x2x - 4x - 28 = 6 - 3x-2x - 4x + 3x = 6 + 28-3x = 34x = -34/3
2)а) 1.26x + 3.58 = 1.74x + 6.461.26x - 1.74x = 6.46 - 3.58-0.48x = 2.88x = -2.88 / -0.48x = 6
б) 0.8 - 5.12 - 0.08y = 4.92y - y-4.32 - 0.08y = 4.92y - y-4.32 = 4.92y - y + 0.08y-4.32 = 3.92yy = -4.32 / 3.92y = -1.1
1)
а) -7 + 3y = 8 - 16 + 8y
3y - 8y = 8 - 16 + 7
-5y = -1
y = 1/5
б) 10 - 10x = 2x - 6 + 4
10 + 6 = 2x + 10x
16 = 12x
x = 4/3
в) 2x - 4(x + 7) = 6 - 3x
2x - 4x - 28 = 6 - 3x
-2x - 4x + 3x = 6 + 28
-3x = 34
x = -34/3
2)
а) 1.26x + 3.58 = 1.74x + 6.46
1.26x - 1.74x = 6.46 - 3.58
-0.48x = 2.88
x = -2.88 / -0.48
x = 6
б) 0.8 - 5.12 - 0.08y = 4.92y - y
-4.32 - 0.08y = 4.92y - y
-4.32 = 4.92y - y + 0.08y
-4.32 = 3.92y
y = -4.32 / 3.92
y = -1.1