The solution equation: X △ 2 + (10-x) △ 3 = 4 There should be a process

The solution equation: X △ 2 + (10-x) △ 3 = 4 There should be a process

First, eliminate △ 2 and △ 3, multiply the left and right sides by 2 at the same time, and then multiply by 3
(X÷2）×2+（10-X）÷3×3=4×2×3
Because multiplying the same number at the same time does not change the number on both sides of the equation, and the number of division is eliminated
So we have to
3X+2(10-X）=24
Then multiply the equation to a large number
3X+20-2X=24
So x = 24-20
X=4

Solution equation: (x + 3) (x-4) = 10

(x+3)(x-4)=10
x²-x-12=10
x²-x=22
x²-x+1/4=22+1/4
(x-1/2)²=89/4
x-1/2=±√89/2
x=(1-√89)/2,x=(1+√89)/2