Question

解方程。+27x+31x=145+2.2x-0.5×2=10+3×15+2x？

Answer 1

解方程。 27x + 31x = 145 2.2x–0.5×2 = 10 3×1.5 + 2x = 11.5 13x –7x = 5.7解:58x = 145 x = 145÷58 x = 2.5解:2.2x –1 = 10 2.2x = 11 x = 5解:4.5+2x = 11.5 2x = 7 x = 3.5解

Answer 2

27x 31x = 145 58x = 145 58x = 145/58x = 5/22.2 x-0.5 * 2 = 10 2.2 x-1 = 102.2 x = 10 12.2 x = 11/2.2 x = 53 * 1.5 2x = 11.5 4.5 2x = 11.52 x = 11.5-4.52 x = 7x = 3.513 x-7x = 5.7x = 5.7 x