If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5^(x+3)=15
We move all terms to the left:
5^(x+3)-(15)=0
We move all terms containing x to the left, all other terms to the right
5^(x+3)=15
| 3x×2=90x+112 | | 3y+10=-10+5(y-1) | | y3−0.8=−3.4 | | 3x-30-x=10+2x+5x+2 | | x+6.75=14 | | −7x−13≥=8 | | 3m-8m-2m+16m=4m | | 5w+8w+4=8 | | 50=1x+60 | | (x+12)2=4 | | 3(2r+8)=-30 | | 8v-4(v+10)=8 | | 38=1x+60 | | 4x(7+x)=20 | | 12x+3=5x-25 | | 17x+4=8x-59 | | 4d-5.98=79.94 | | 8x+28=12x | | 6b+4b=90 | | –3q=–2q+10 | | 92+-7x=43 | | 18x+3=10x-29 | | 108=14x+2 | | 7x15=74.5 | | 4x(x-7)=20 | | x{x+6}=9 | | 72=6p2 | | |x+2|*x=0 | | 2.1x =16.8 | | 90+90+90+x=360 | | |x^2-4|*x=0 | | 3x+9-7x-7=2x-3x+3 |