Please help me!! Very important

Mathematics

2 answers:

melomori [17]3 years ago

6 0

Hello,
Let x represent the total of jumps
y represent the total “ raised the roof "

Here are two equation:
3x+2y=50
x+y=19
To solve this, I would prefer to use substitution because it is the easiest way to do:
x+y=19
Times 3 from both side
3x+3y=57
-
3x+2y=50
=
y=7
x=19-7=12. As a result, Roxanne jumps 12 , and “ raised the roof ” 7 times. Hope it help!

givi [52]3 years ago

3 0

3x+2y=50
x+y=19
x=12, y=7
12 jumps, 7 "raise the roof"s

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