How to solve the equation x / 80 + (x + 215) / 210 = 10

How to solve the equation x / 80 + (x + 215) / 210 = 10

X/80+(X+215)/210=10 （21x/1680）+【（8x+1720）/1680】=10 （29x+1270）/1680=10 29x+1270=16800 29x=15530 x=15530/29

A fruit planting base plans to harvest 15 tons of apples and oranges last year. The actual harvest is 17 tons. Among them, 15% of apples and 10% of oranges are overproduced. How many tons of apples and oranges are actually harvested last year

x+y=15;
x*(1+15%)+y*(1+10%)=17;
The solution is x = 10;
y=5;
So last year's apple harvest was x * 1.15 = 10 * 1.15 = 11.5 tons
The yield of orange is y * 1.1 = 5 * 1.1 = 5.5 tons

You gods help to solve the equation x + 10 = (xx20% - 10) △ 4

x+10=4(0.2x-10)
x+10=0.8x-40
0.2x=-50
x=-250