If it's not what You are looking for type in the equation solver your own equation and let us solve it.
87=23^x
We move all terms to the left:
87-(23^x)=0
We move all terms containing x to the left, all other terms to the right
-23^x=-87
x=-87/1
x=-87
| 4·3^x=8·7^x | | -7(x-2)-16=-2 | | 2x^2+4x-28=0 | | 8n-3=3n-10 | | 4x+5x=980 | | 5x+4x=980 | | -8y+3=-3(2y+5) | | 3/8p=33 | | G(-7)=-2x-9 | | -8y+3=-3 | | 42/x=7/6 | | F(5)=3n-10 | | 42÷x=7÷6 | | 17+5=(3c-2) | | 12x+5=4x-37 | | 6x=90/x | | f(f-1)=40 | | -10(s+5)=-22 | | 72+(x+15)=180 | | 3+7.x=49 | | x=67-10.05 | | 5/9(s°F-32)=°C | | (4^x+2)(8^x-5)=16 | | $x-87=135$ | | x=67-(15/100*67) | | 5x^2-28x+14=0 | | (-9x+5)^1/2=(3+4x)^1/2 | | 8x^2=x | | 5x+5=(7x-6)/2 | | 202-40x=0 | | 6(q-8)=42 | | 1/3(3-9x)=11 |