1) 0.9x - 0.6(x-3) = 2(0.2x-1.3)0.9x - 0.6x + 1.8 = 0.4x - 2.60.3x + 1.8 = 0.4x - 2.61.8 + 2.6 = 0.4x - 0.3x4.4 = 0.1xx = 44
2) -0.4(3x-1) + 8(0.8x-0.3) = 5 - (3.8x+4)-1.2x + 0.4 + 6.4x - 2.4 = 5 - 3.8x - 45.2x - 2 = 0.2x - 95.2x - 0.2x = -9 + 25x = -7x = -7/5
3) 4/7(0.56-4.2y) + 0.4 = 5/13(0.52-6.5y)(4/7)(-3.64y) + 0.4 = (5/13)(-6.98y)-2.464y + 0.4 = -4.54y2.076y = 0.4y = 0.4 / 2.076y ≈ 0.1928
1) 0.9x - 0.6(x-3) = 2(0.2x-1.3)
0.9x - 0.6x + 1.8 = 0.4x - 2.6
0.3x + 1.8 = 0.4x - 2.6
1.8 + 2.6 = 0.4x - 0.3x
4.4 = 0.1x
x = 44
2) -0.4(3x-1) + 8(0.8x-0.3) = 5 - (3.8x+4)
-1.2x + 0.4 + 6.4x - 2.4 = 5 - 3.8x - 4
5.2x - 2 = 0.2x - 9
5.2x - 0.2x = -9 + 2
5x = -7
x = -7/5
3) 4/7(0.56-4.2y) + 0.4 = 5/13(0.52-6.5y)
(4/7)(-3.64y) + 0.4 = (5/13)(-6.98y)
-2.464y + 0.4 = -4.54y
2.076y = 0.4
y = 0.4 / 2.076
y ≈ 0.1928