What is 2(3r+7)-(2+r) ?

The solution to 2(3r+7)-(2+r) is 5r+12

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simplify 2(3r+7)-(2+r)

simplify

2 (3 r + 7) - (2 + r)

5 r + 12

Solution steps

2 (3 r + 7) - (2 + r)

Apply the distributive law:

- (a + b) = - a - b

- (2 + r) = - 2 - r

= 2 (3 r + 7) - 2 - r

Expand

2 (3 r + 7) : 6 r + 14

= 6 r + 14 - 2 - r

Group like terms

= 6 r - r + 14 - 2

Add similar elements:

6 r - r = 5 r

= 5 r + 14 - 2

Subtract the numbers:

14 - 2 = 12

= 5 r + 12

\frac{( \frac{1}{x + 1} - \frac{1}{x - 1} )}{( \frac{1}{x - 1} + \frac{1}{x + 1} )}

1.0 2^{12}

\frac{x ^{2} - 2 x - 15}{x ^{2} - 13 x + 40}

x^{2} - 5 x - 104

lo g_{10} (1 0^{1})