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3 years ago

Please solve 21=5n-2(n-3)

Mathematics

2 answers:

Stella [2.4K]3 years ago

8 0

21 = 5n-2(n-3)

21 = 5n-2n+6

21-6 = 3n

n=15/3

n=5

grigory [225]3 years ago

3 0

5=n because you multiply -2 times n then -3 then you add -2n with 5n then subtract 6 from both sides and finally divide by 3

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5x+10 = 70

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---------------------

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Assignment: $\bold{\Solve \ Equation: \ 11x+12=8x-9}$

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Answer: $\boxed{\bold{x=-7}}$

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Explanation: $\downarrow\downarrow\downarrow$

<><><><><><><>

[ Step One ] Subtract 12 From Both Sides

$\bold{11x+12-12=8x-9-12}$

[ Step Two ] Simplify

$\bold{11x=8x-21}$

[ Step Three ] Subtract 8x From Both Sides

$\bold{11x-8x=8x-21-8x}$

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<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

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