J=john
m=mary
j is 2 times as old as mary
j=2 times m
sum is 21
m+j=21
find mary
subsitute
j=2m therefor subsitute 2m for j
m+2m=21
add like terms
3m=21
divide by 3
m=7
mary=7
*HOPE I HELPED!*
Answer:
Step-by-step explanation: 32 * 6 = 192
so he has not enough stickers
Answer:
nxkckcbdhdjdmdndhdjdkdkdnd
Every term is 3 times the previous onenote that 1/9 times 3/1=3/9=1/3 which is the next term
so 1 times 3=next term=3
next term is 3
Answer:
104
Step-by-step explanation:
156 divided by 6. 156-26=130. now 20 percent of 130 =26. 130-26 = 104
