Answer:
12,180
Step-by-step explanation:
got
9514 1404 393
Answer:
Step-by-step explanation:
If we let x and y represent the costs of a lamp and end table, respectively, the two purchases can be written as ...
3x +2y = 520
2x -y = 20
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These equations can be solved many ways. If we use "elimination", we can add twice the second equation to the first to eliminate y:
(3x +2y) +2(2x -y) = (520) +2(20)
7x = 560 . . . . simplify
x = 80 . . . . . . divide by 7
y = 2x -20 = 2(80) -20 = 140
The cost of a lamp is $80; the cost of an end table is $140.
Answer:
x = 6/5
x = 1.2
x = 1 1/5
Step-by-step explanation:
The answers above are all the same, but in different forms.
The steps to getting x:
1. subtract 12 from the parenthesis which leaves us with 5x = 6
2. Then we want to divide 5 from x which gives up our answer 5x/5 = 6/5
Remember whatever you do on one side it has to be done on the other, hence the equal sign
-5 + 17 = 12 you will do inverse operations.
