If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4r+13=30
We move all terms to the left:
4r+13-(30)=0
We add all the numbers together, and all the variables
4r-17=0
We move all terms containing r to the left, all other terms to the right
4r=17
r=17/4
r=4+1/4
| -7x+2/6=12 | | 3x+17+8x-32+2x=180 | | 0.25x+0.75=15 | | 0.25x+0.75=-15 | | 12/4.5x=48 | | C=2+22/7c=44 | | 57 x+109 +101 x=85 | | −15=−8−9d−10 | | 72-3x=-33 | | g/5=23 | | 200+5h=450 | | (-3x)+7=1 | | 2x/3=x/2=1/4 | | 1/5x=39 | | -68-4x=108 | | f(5)=58 | | 3n+8=27 | | x^2-2√3x=45 | | 2a/3=3a/5+5 | | n/14=28 | | 8(b-2)=412(12+b) | | 38-8b=3(6-6b) | | 37-k+45=180 | | -7=-7x+14/11 | | 6(5-3n)=-30-3n | | 4x+31+-2x+44=90 | | 7x2=49x2 | | 4x+31-2x+44=90 | | -60x+20=-4 | | (s+7)(s-7)=48s | | 8=-6x+10/8 | | 3(a-5)=2(2a+9 |