Answer:
Step-by-step explanation:
6(3x – 8) = 7(7x + 7)
18x - 48 = 49x + 49
49x - 18x = - 48 - 49
31x = - 97
x = - 97/31
x = -3.13
subtract 18x from from each side
-48 = 31x + 49
add 48 to each side
31x +97 = 0
31x = -97
divide both sides by 31
check:
6(3[-3.13] - 8) = 7(7[-3.13] + 7)
-104.35 = -104.35
105
because all the angles added up have to = 180
60+15=75
75-180=105
20km/4km/h=5h
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0.18!
