Question

方程计算

[(8.7+x)÷0.13-85.75]÷0.25=77
2.25÷[7.5×(2.56÷x)]-0.06=0.315

Answer 1

[(8.7+x)÷0.13-85.75]÷0.25=77
(8.7+x)÷0.13-85.75=77*0.25
(8.7+x)÷0.13-85.75=19.25
(8.7+x)÷0.13=85.75+19.25
(8.7+x)÷0.13=105
8.7+x=105*0.13
8.7+x=13.65
x=13.65-8.7
x=4.95

2.25÷[7.5×(2.56÷x)]-0.06=0.315
2.25÷[7.5×(2.56÷x)]=0.315+0.06
2.25÷[7.5×(2.56÷x)]=0.375
7.5×(2.56÷x)=2.25÷0.375
7.5×(2.56÷x)=6
2.56÷x=6÷7.5
2.56÷x=0.8
x=2.56÷0.8
x=3.2

Answer 2

（1） [(8.7+x)÷0.13-85.75]÷0.25=77
(8.7+x)÷0.13-85.75=77X0.25
(8.7+x)÷0.13=19.25+85.75
8.7+x=105 X0.13
x=13.65-8.7
=4.95
(2) 2.25÷[7.5×(2.56÷x)]-0.06=0.315
2.25÷[7.5×(2.56÷x)]=0.315+0.06
2.25=0.375X7.5×(2.56÷x)]
2.56÷x=2.25÷(0.375X7.5）
2.56÷x=0.8
0.8x=2.56
x=3.2
2.56÷x=

Answer 3

42.4875 9.45

Answer 4

4.95
2.77

Answer 5

(1).X=4.95 ( 2) 0.288