v*t=(v-4)*(t+1)

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Solution for v*t=(v-4)*(t+1) equation:


Simplifying
v * t = (v + -4)(t + 1)

Multiply v * t
tv = (v + -4)(t + 1)

Reorder the terms:
tv = (-4 + v)(t + 1)

Reorder the terms:
tv = (-4 + v)(1 + t)

Multiply (-4 + v) * (1 + t)
tv = (-4(1 + t) + v(1 + t))
tv = ((1 * -4 + t * -4) + v(1 + t))
tv = ((-4 + -4t) + v(1 + t))
tv = (-4 + -4t + (1 * v + t * v))

Reorder the terms:
tv = (-4 + -4t + (tv + 1v))
tv = (-4 + -4t + (tv + 1v))
tv = (-4 + -4t + tv + 1v)

Add '-1tv' to each side of the equation.
tv + -1tv = -4 + -4t + tv + -1tv + 1v

Combine like terms: tv + -1tv = 0
0 = -4 + -4t + tv + -1tv + 1v

Combine like terms: tv + -1tv = 0
0 = -4 + -4t + 0 + 1v
0 = -4 + -4t + 1v

Solving
0 = -4 + -4t + 1v

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '4t' to each side of the equation.
0 + 4t = -4 + -4t + 4t + 1v
Remove the zero:
4t = -4 + -4t + 4t + 1v

Combine like terms: -4t + 4t = 0
4t = -4 + 0 + 1v
4t = -4 + 1v

Divide each side by '4'.
t = -1 + 0.25v

Simplifying
t = -1 + 0.25v

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