If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21=2(x)+5
We move all terms to the left:
21-(2(x)+5)=0
We get rid of parentheses
-2x-5+21=0
We add all the numbers together, and all the variables
-2x+16=0
We move all terms containing x to the left, all other terms to the right
-2x=-16
x=-16/-2
x=+8
| 17x+5-2x=50 | | 7/3=4/v | | 5x-(9x+8)=3x-15 | | 420=n(n-1) | | 2^3x+1=118 | | Z-24/5+8z=z+4 | | 2^3x-1=118 | | 5x=+34-14x=-2 | | 2/3(x)-1/6=5/12 | | -36x^2-144x+96=0 | | 5x2−19x=−12 | | 14+8y=-6+-2y | | x+1/3=2-x+4/5 | | -9x-14=4 | | 9v+4-6=32 | | -4y+6=23y−3 | | (3k+7)/4=16 | | -16/5=8x | | (15)/(x)=(3)/(x-7) | | -5y/9=-35 | | -2=-8+3x | | 2x/8=1.5/6 | | 2170=x+0.05x+0.07x+0.12x | | √(x+10)+√(x-9)=19 | | 78=(x)(x+7) | | -4/5=-4/3+s | | 3x+5+2x+1=5x+6 | | 2170=x+0.05+0.07+0.12x | | 3x+5+2x+1=5x+7 | | 3y+2y=28 | | 12y-18=5y+13 | | 3x-1/3+x-2/4-x-1/2=13/6 |