7.6 is 2.6 more than 1 / 8 of a number. How much is this number?

7.6 is 2.6 more than 1 / 8 of a number. How much is this number?

Let this number be X
1/8X+2.6=7.6
1/8X=7.6-2.6
X=5÷1/8
X=40
A: the number is 40

How to set up an equation with 8 x's more than 5 x's?
This is a mathematical problem. I'm not familiar with equations, and I seldom touch with equations of different types,

The equation of 8x-5x = 453x = 45x = 15 is actually quite simple. As long as the difference between two numbers is equal to the difference after subtracting the less from the more, it is an equation

The difference between 4 times of X and 1.8 is 2.6

1.1

Known: x + y + y = 20, x + y = 15
Fast

x+y+y=20 x+2y=20 x=20-2y
x+y=15
(20-2y)+y=15
The solution is y = 5
x=10