Answer:
M = n - 1
Step-by-step explanation:
7m + 2 = 7n - 5
Group like terms
7m = 7n - 5 - 2
7m = 7n - 7
7m/7 = 7n /7 - 7/7
M = n - 1
Mean is all of the numbers added up and then divided by the number of the numbers. so for example; 32+36+38+39+42+43+44+47+49+50 divided by 10 do that and then group 2, and if you already know how to do that then answer the questions
Answer:
if you swap ever x for a -2 the answer is -21
Step-by-step explanation:
Jimmy - j years now
Beth -(j+2) years now
In 3 years
Jimmy - (j+3)
Beth -(j+2+3)=(j+5)
j+3 + j+5=(2j+8) - sum of their ages in 3 years
y years ago
Jimmy - (j-3)
Beth - (j+2-3)= (j-1)
j-3+j-1=(2j - 4) - sum of their ages in 3 years ago
(2j+8) =2(2j - 4)
2j+8 = 4j-8
2j = 16
j = 8
Jimmy - 8 years now
Beth - 8+2=10 years now