79 ∗ 20 = ( 80 ∗ 20 ) − ( n ∗ 18 ) 1580 = 1600 − 18 n 1580 − 1600 = 18 n − 20 = 18 n ∣ : 2 − 10 = 9 n n = − 9 10
79 × 20 = (80 × 20) - (n × 18) * :First, multiply what is on the left of the equation*
1580 = (80 × 20) - (n × 18) * :Then, solve for what is in the first parenthesis*
1580 = (1600) - (n × 18) * :Then, act like there is a 1 in front of the negative and distribute*
**1580 = 1600 - 18n ** :Then, subtract 1600 from both sides
-20 = -18n :Then, divide the whole equation by -18
1.1 = n
Your final answer is:
n = 1.1
To solve for n in the equation given, we calculated the left and right sides, rearranged to isolate n , and found that n = 9 10 .
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