jorgeyaritzy2001
19.07.2019 •
Mathematics
4.5x+ 7/9 x+2 1/3 + 1/6 x=5 1/18 what is the answer? ? how would you solve it? ?
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Ответ:
(4.5*18)x +((7/9)*18)x + (2 1/3)*18 + ((1/6)*18)x = (5 1/18)*18
81x +14x +42 +3x = 91 . . . . . simplify
Collect terms.
98x + 42 = 91
98x = 49 . . . . . . . . . subtract 42
x = 49/98 = 1/2
The solution is x = 1/2.
You can also do the arithmetic with mixed numbers and fractions. The usual methods apply.
(4.5 + 7/9 + 1/6)x + 2 1/3 = 5 1/18
(49/9)x + 7/3 = 91/18
(49/9)x = 49/18 . . . . . . . subtract 7/3
x = (9/49)(49/18) = 9/18 = 1/2 . . . . . multiply by 9/49
This can be a little more tedious than the method above, but it works and it will give you the right answer. A calculator that works with fractions can make this solution as easy as the other one.
Ответ:
=−3928
Step-by-step explanation:
((−4)(−5))^22(−7)−14(14−5)^2+6
=(20^2)(−7)−14(14−5)^2+6
=(400)(−7)−14(14−5)^2+6
=−2800−14(14−5)^2+6
=−2800−14(9^2)+6
=−2800−(14)(81)+6
=−2800−1134+6
=−3934+6
=−3928