Answer:
the answer is 7!
Step-by-step explanation:
divide 21 and 3 and you get 7
You would multiply both sides by 3 to cancel out the divide 3.
z÷3=8
z=24
Answer:
Emma = 17
Clare = 12
Mark = 34
Step-by-step explanation:
Emma = x
Clare = x-5
Mark = 2x
2x+x+x-5=63
4x=5=63
4x=63+5
4x=68
x=17
Emma = x = 17
Clare = x-5 = 17-5 = 12
Mark = 2x = 2(17) = 34
