1 / 10 (100 + x) - 3 / 10 (200-x) = 100 * (7 / 25) equation

1 / 10 (100 + x) - 3 / 10 (200-x) = 100 * (7 / 25) equation

1/10(100+x)-3/10(200-x)=100*(7/25）
10+0.1x-60-0.3x=28
-0.2x-50=28
-0.2x=78
X has no solution

60% of a number is more than 4 / 7 of 63. Find this number and use the solution of the equation

Let this number be X
X*60%-63×4/7=5
0.6X-36=5
0.6X=41
X=41÷0.6
X=205/3

Two out of seven of a number is two out of three of 63. What's the number? (solve the equation)

Let this number be X
According to the meaning and known, there are:
(2/7)x=(2/3)×63
(1/7)x=(1/3)×63
x/7=21
x=147
A: the number is 147

The sum of 4 / 7 of a number and 30% of this number is 12.2. The equation is used to solve this number

Let this number be x, then:
4x/7+0.3x=12.2
61x/70=12.2
x=854/61=14
So the number is 14