7*9=(7*10)-(7-T)

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Solution for 7*9=(7*10)-(7-T) equation: 


Simplifying
7 * 9 = (7 * 10) + -1(7 + -1T)

Multiply 7 * 9
63 = (7 * 10) + -1(7 + -1T)

Multiply 7 * 10
63 = (70) + -1(7 + -1T)
63 = 70 + -1(7 + -1T)
63 = 70 + (7 * -1 + -1T * -1)
63 = 70 + (-7 + 1T)

Combine like terms: 70 + -7 = 63
63 = 63 + 1T

Add '-63' to each side of the equation.
63 + -63 = 63 + -63 + 1T

Combine like terms: 63 + -63 = 0
0 = 63 + -63 + 1T

Combine like terms: 63 + -63 = 0
0 = 0 + 1T
0 = 1T

Solving
0 = 1T

Solving for variable 'T'.

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

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

Combine like terms: 1T + -1T = 0
-1T = 0

Divide each side by '-1'.
T = 0

Simplifying
T = 0

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