6+(8+7)=

Slove and if you like mha lets chat :)

the answer would be: 21

hope this helps you!!! :))))))

Step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.