4.2y+0.8=6.2y-(1.1y+0.8)+1.2

Simplifying 4.2y + 0.8 = 6.2y + -1(1.1y + 0.8) + 1.2 Reorder the terms: 0.8 + 4.2y = 6.2y + -1(1.1y + 0.8) + 1.2 Reorder the terms: 0.8 + 4.2y = 6.2y + -1(0.8 + 1.1y) + 1.2 0.8 + 4.2y = 6.2y + (0.8 * -1 + 1.1y * -1) + 1.2 0.8 + 4.2y = 6.2y + (-0.8 + -1.1y) + 1.2 Reorder the terms: 0.8 + 4.2y = -0.8 + 1.2 + 6.2y + -1.1y Combine like terms: -0.8 + 1.2 = 0.4 0.8 + 4.2y = 0.4 + 6.2y + -1.1y Combine like terms: 6.2y + -1.1y = 5.1y 0.8 + 4.2y = 0.4 + 5.1y Solving 0.8 + 4.2y = 0.4 + 5.1y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.1y' to each side of the equation. 0.8 + 4.2y + -5.1y = 0.4 + 5.1y + -5.1y Combine like terms: 4.2y + -5.1y = -0.9y 0.8 + -0.9y = 0.4 + 5.1y + -5.1y Combine like terms: 5.1y + -5.1y = 0.0 0.8 + -0.9y = 0.4 + 0.0 0.8 + -0.9y = 0.4 Add '-0.8' to each side of the equation. 0.8 + -0.8 + -0.9y = 0.4 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + -0.9y = 0.4 + -0.8 -0.9y = 0.4 + -0.8 Combine like terms: 0.4 + -0.8 = -0.4 -0.9y = -0.4 Divide each side by '-0.9'. y = 0.4444444444 Simplifying y = 0.4444444444

4,2y+0.8=6.2y-1.1y-0.8+1.2 4.2y-6.2y+1.1y=-0.8-0.8+1.2 3.1y=-0.4/ 31 y=31/4 y=7 3/4 Ответ/ 7 3/4