(1)x-35x=35(2)20%x+1.5=23(3)1.5x+20%x=5.95(4)4.8:x=3.2:24(5)79:29=x:25(6)(x-2)×3=0.18.-数学
题文
|
答案
(1)x-
(1-
x=
x=
(2)20%x+1.5=23, 0.2x+1.5-1.5=23-1.5, 0.2x=21.5, 0.2x÷0.2=21.5÷0.2, x=107.5; (3)1.5x+20%x=5.95, (1.5+0.2)x=5.95, 1.7x=5.95, 1.7x÷1.7=5.95÷1.7, x=3.5; (4)4.8:x=3.2:24, 3.2x=4.8×24, 3.2x=115.2, 3.2x÷3.2=115.2÷3.2, x=36; (5)
7:2=x:
2x=7×
2x=
2x÷2=
x=
|