8000=80000(1+r)40

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Solution for 8000=80000(1+r)40 equation:


Simplifying
8000 = 80000(1 + r) * 40

Reorder the terms for easier multiplication:
8000 = 80000 * 40(1 + r)

Multiply 80000 * 40
8000 = 3200000(1 + r)
8000 = (1 * 3200000 + r * 3200000)
8000 = (3200000 + 3200000r)

Solving
8000 = 3200000 + 3200000r

Solving for variable 'r'.

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

Add '-3200000r' to each side of the equation.
8000 + -3200000r = 3200000 + 3200000r + -3200000r

Combine like terms: 3200000r + -3200000r = 0
8000 + -3200000r = 3200000 + 0
8000 + -3200000r = 3200000

Add '-8000' to each side of the equation.
8000 + -8000 + -3200000r = 3200000 + -8000

Combine like terms: 8000 + -8000 = 0
0 + -3200000r = 3200000 + -8000
-3200000r = 3200000 + -8000

Combine like terms: 3200000 + -8000 = 3192000
-3200000r = 3192000

Divide each side by '-3200000'.
r = -0.9975

Simplifying
r = -0.9975

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