Answer:
x=6
Step-by-step explanation:
Combine like terms, 5x and 7x
12x=72
Isolate the variable by dividing by 12
x=6
S = sisters ages
M =2S +7
M=13
13 = 2S+7
subtract 7 from each side
6 = 2S
divide by 2
3=S
sisters age is 3
Answer:
57/41
Step-by-step explanation:
41 * x = 57
x = 57/41
Answer:
if we take the number of quarters Barrett have to be x we know Penelope has twice that ie 2x. so in total they have 2x+x = 60, 3x = 60; so x= 60/3 = 20.
Barrett has 20 quarters.