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Bas_tet [7]
2 years ago
5

Enter the value of n so the expression (-y+ 5.3) + (7.2y-9) is equivalent to 6.2y+n.

Mathematics
1 answer:
Mashcka [7]2 years ago
6 0

Answer:

\boxed{\bold{Decimal: \ n \ = \ -3.7}}

\boxed{\bold{Fraction: \ n=-\frac{37}{10}}}

Step By Step Explanation:

Rewrite Equation:

\bold{\left(-y+5.3\right)+\left(7.2y-9\right)=6.2y+n}

Switch Sides:

\bold{6.2y+n=\left(-y+5.3\right)+7.2y-9}

Remove Parenthesis: (a) = a

\bold{6.2y+n=-y+5.3+7.2y-9}

Group Like Terms:

\bold{6.2y+n=-y+7.2y+5.3-9}

Combine Similar Elements: \bold{-y+7.2y=6.2y}

\bold{6.2y+n=6.2y+5.3-9}

Subtract: \bold{5.3-9=-3.7}

\bold{6.2y+n=6.2y-3.7}

Multiply Both Sides By 10:

\bold{6.2y\cdot \:10+n\cdot \:10=6.2y\cdot \:10-3.7\cdot \:10}

Refine:

\bold{62y+10n=62y-37}

Subtract 62y From Both Sides:

\bold{62y+10n-62y=62y-37-62y}

Refine:

\bold{10n=-37}

Divide Both Sides By 10:

\bold{\frac{10n}{10}=\frac{-37}{10}}

Simplify:

\bold{n=-\frac{37}{10}}

Turn Fraction Into Decimal:

\bold{-37 \ \div \ 10}

Refine:

\bold{-3.7}

- Mordancy

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