If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
49r2 + -81 = 0
Reorder the terms:
-81 + 49r2 = 0
Solving
-81 + 49r2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '81' to each side of the equation.
-81 + 81 + 49r2 = 0 + 81
Combine like terms: -81 + 81 = 0
0 + 49r2 = 0 + 81
49r2 = 0 + 81
Combine like terms: 0 + 81 = 81
49r2 = 81
Divide each side by '49'.
r2 = 1.653061224
Simplifying
r2 = 1.653061224
Take the square root of each side:
r = {-1.285714286, 1.285714286}
| m-6=13 | | 6x-5=58+x | | 5-3y=-7 | | 10-g=7 | | 5*6= | | 81x=-9 | | 5*6(72/5-8)=3-1 | | 2x+39=9x-38 | | 0.3x+0.1y=-0.1 | | 5*6(72/5-8)= | | 9c^2-121= | | 10+5*10x^2= | | 7x^3+x^2-28x-4=0 | | -35y=15 | | 3a+6=5a-80 | | bm*2-7m=3 | | 22+2+2=2 | | 9s^2-16= | | 10(x-6)-5=40 | | 3f+16=4f-10 | | w^2-64= | | y=p+q+r*9 | | 141-6x=5x+20 | | -3x^2+6x-11=0 | | 8-5x-2-10x= | | -18m=36 | | 5*(2-x)=12x | | s^2-36= | | 39-2x=16x+15 | | 8m*2-2m=7 | | 5-8x=50-29x | | 2x^3-2x^2y-84xy^2= |