7(t-3)=2(t-9)+2r

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Solution for 7(t-3)=2(t-9)+2r equation:


Simplifying
7(t + -3) = 2(t + -9) + 2r

Reorder the terms:
7(-3 + t) = 2(t + -9) + 2r
(-3 * 7 + t * 7) = 2(t + -9) + 2r
(-21 + 7t) = 2(t + -9) + 2r

Reorder the terms:
-21 + 7t = 2(-9 + t) + 2r
-21 + 7t = (-9 * 2 + t * 2) + 2r
-21 + 7t = (-18 + 2t) + 2r

Reorder the terms:
-21 + 7t = -18 + 2r + 2t

Solving
-21 + 7t = -18 + 2r + 2t

Solving for variable 't'.

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

Add '-2t' to each side of the equation.
-21 + 7t + -2t = -18 + 2r + 2t + -2t

Combine like terms: 7t + -2t = 5t
-21 + 5t = -18 + 2r + 2t + -2t

Combine like terms: 2t + -2t = 0
-21 + 5t = -18 + 2r + 0
-21 + 5t = -18 + 2r

Add '21' to each side of the equation.
-21 + 21 + 5t = -18 + 21 + 2r

Combine like terms: -21 + 21 = 0
0 + 5t = -18 + 21 + 2r
5t = -18 + 21 + 2r

Combine like terms: -18 + 21 = 3
5t = 3 + 2r

Divide each side by '5'.
t = 0.6 + 0.4r

Simplifying
t = 0.6 + 0.4r

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