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Leya [2.2K]
3 years ago
7

What is the value of x in the equation x – y = 30, when y = 15?

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
6 0
The value of x is 45
natta225 [31]3 years ago
3 0
X = 45 hope this helps

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Calculate the value of T for which T=m2 +am when m=3 and a=5
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Answer:

T=21

Step-by-step explanation:

Plugin the values of m and a;

(3)2+(5)(3)

6+15= 21

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If we know that 5 cups of flour is used to make 20 biscuits, how many biscuits are made with 15 cups of flour?
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What is y in the equation 2/3 (2y+1) = 3/7 (2-y)
Alik [6]

Answer:

y=\frac{4}{37}

Step-by-step explanation:

\frac{2}{3}(2y+1)=\frac{3}{7}(2-y)

\frac{4}{3}y+\frac{2}{3}  =\frac{6}{7}- \frac{3}{7}y

Add \frac{3}{7}y on both sides and subtract \frac{2}{3} on both sides.

(\frac{3}{7}y- \frac{2}{3})+\frac{4}{3}y+\frac{2}{3}  =\frac{6}{7}- \frac{3}{7}y+(\frac{3}{7}y- \frac{2}{3})

\frac{3}{7}y+\frac{4}{3}y=\frac{6}{7}-\frac{2}{3}

Solve the fractions.

\frac{(3)(3)+(7)(4)}{(7)(3)}y=\frac{(6)(3)-(7)(2)}{(7)(3)}

\frac{9+28}{21} y=\frac{18-14}{21}

\frac{37}{21}y =\frac{4}{21}

Multiply by the reciprocal of the fraction with the variable to isolate the variable. The reciprocal is the inverted fraction.

\frac{21}{37}*\frac{37}{21}y  =\frac{4}{21}*\frac{21}{37}

y=\frac{4}{37}

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3 years ago
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