Let sister be s. Matthew, M
Matthew is 7years older than twice the age of his sister
M = 7 + 2s
13 = 7 + 2s. 7 crosses the equality to other side and becomes -7
13 - 7 = 2s
6 = 2s Divide both sides by 2
6/2 = 2s/2
3 = s
Sister is 3 years old.
Im not sure what your asking add more please
Answer:
yes you are correct
Step-by-step explanation:
Answer:
See answer below:
Step-by-step explanation:
Blue: y=2x+1
Red: y=3x-2