What is the answer to r/2 =(r+10)/4 ?

The answer to r/2 =(r+10)/4 is r=10

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r/2 =(r+10)/4

\frac{r}{2} = \frac{r + 10}{4}

r = 10

Solution steps

\frac{r}{2} = \frac{r + 10}{4}

Apply fraction cross multiply: if

\frac{a}{b} = \frac{c}{d}

then

a \cdot d = b \cdot c

r \cdot 4 = 2 (r + 10)

Expand

2 (r + 10) : 2 r + 20

r \cdot 4 = 2 r + 20

Move

2 r

to the left side

2 r = 20

Divide both sides by

2

r = 10

- 7 r + 13 = - 71

x, 7 x + 2 y = - 5

0.3 x + 1.8 = 0.4 (x + 5) - 0.2

4 (2 x - 1) = - 2 (3 x + 16)

11 x - 15 = 5 x - 13