If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5-4t=21
We move all terms to the left:
5-4t-(21)=0
We add all the numbers together, and all the variables
-4t-16=0
We move all terms containing t to the left, all other terms to the right
-4t=16
t=16/-4
t=-4
| 18h=612 | | 26=19-x | | -24+3p=6(3p+6) | | 30=2*v | | m+4+6=11 | | 8+8g=8g+8 | | 3x-6x-9=-3x+8-9 | | x/7-20=-14 | | 2(4z-16)-5z=-5 | | 6(x+5)=70. | | 15(a+2)+9a=6 | | 5c+89=939 | | 1/2(4x-5)+5/2=20 | | 34=-(3+3m)+4(3m+7) | | 0.5(x-4)=37+7x | | 27x-23+14x=7-12 | | 4x+6=4x-12 | | -r+6=-9+4r | | 3(x-12)=-8-4 | | -2(f−3)=-14 | | -80-x=-7x+76 | | 4(x+17)=732 | | (19x-18)+(10x-9)+(7x+1)=180 | | 19+4x=5x+12 | | 7a=2a+5 | | 4+x÷6=x-2÷6 | | 2+3x-4=4 | | 14=2y/9 | | 60=x+126 | | 7-m=17 | | 9=b5 | | 4x8=8x+12 |