If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15r+15=150
We move all terms to the left:
15r+15-(150)=0
We add all the numbers together, and all the variables
15r-135=0
We move all terms containing r to the left, all other terms to the right
15r=135
r=135/15
r=9
| (3x-39)=90 | | -5(3x-15)=2(x-7)-13 | | 0.4d+2.9=1.5 | | a+(-10)=-26 | | -5+9n=9-5n | | 66=-6y | | 4x+x+15=75 | | 93=-2(p-8)-4p | | 5/6x-3/8x=1/2x-4 | | 4-2c=7 | | 12x-13=3x+14 | | 3(4-x)+6x=4x12-x | | -7x-5+4x=7 | | 12x+13=3x+14 | | -21=b+(-16) | | x-1+7x=10-3x | | -7x-5+4=7 | | 26x+6+21-1+11x+1=180 | | 1/2x-3=-6/5x-1/2 | | 7r-7r=16+2r | | -12=3x-16 | | k-7=3/4 | | (180(n-2))/n=60 | | 3r−2r=15 | | 14+3x=2(-x+7)-20 | | d=150624+56255 | | -6-5x=-6x-5+3 | | 58+7y=30 | | x+(x/3)*2=180 | | x+19=x+14 | | 77.5x-2=308 | | (8x-16)°=(6x+20)° |