Question

解方程怎么算过程写出来

y+y/7=2.4
3*(x-0.1)=0.6

Answer 1

第一道两边都乘以7得出 7y+y=2.4x7 然后提取y得出 y(7+1)=2.4x7 算出y=2.1
第二道把3移到等式右边得出 x-0.1=0.2 算出x=0.3

Answer 2

由Y+Y/7=2.4得Y(1+1/7)=2.4， 得8Y/7=2.4， 得Y=2.4*7/8
由3*（X-0.1)=0.6得X-0.1=0.6/3， 得X=0.2+0.1=0.3

Answer 3

y+y/7=2.4
等号俩边都乘以7得：
7y+y=16.8
y=2.1
3*(x-0.1)=0.6
展开括号
3x-0.3=0.6
3x=0.9
x=0.3

Answer 4

y+y/7=2.4
7y+y=2.4*7
8y=2.4*7
y=(2.4*7)/8
y=2.1
3*(x-0.1)=0.6
x-0.1=0.6/3
x-0.1=0.2
x=0.2+0.1
x=0.3

Answer 5

7y/7+y/7=2.4 => 8y/7=2.4 =>8y=2.4*7 =>y=2.1

(x-0.1)=0.6/3 =>x-0.1=0.2 =>x=0.3