1 / 10x + (x + 2) / 15 = 1 use this equation to work out a mathematical problem

1 / 10x + (x + 2) / 15 = 1 use this equation to work out a mathematical problem

For a project, it takes 10 days for Party A and 15 days for Party B to complete. First, Party A does it for a few days, and then Party B does it for two days more than Party A. how many days does it take for Party A to complete the project

Mathematics equation problem, junior high school
X & sup2; + Y & sup2; + 2x-4y + 5 = 0 find the power of X to the power of 2009 - 2009 * 2 (Y-2)

x^2+y^2+2x-4y+5
=(x^2+2x+1)+(y^2-4y+4)
=(x+1)^2+(y-2)^2
=0
X = - 1, y = 2
simple form
=-1-2009*0/2
=-1

How to solve a math equation problem in the first semester of junior high school: 1 / 5 (x + 15) = 1 / 4-1 / 2 (X-7)

1/5(X+15)=1/4-1/2(x-7)
1/5X+3=1/4-1/2X+7/2
1/5X+1/2X=1/4+7/2-3
7X/10=3/4
X=3/4*10/7
X=15/14

How to calculate the formula x × 7.11% × 3 = 2426.6-x

x×7.11%×3=2426.6-x
21.33%x+x=2426.6
1.2133x=2426.6
x=2000