Question

Evaluate 7y+13-4z when y=5 and z=9

Answer 1

7y add 13 minus 4z Y=5 z=9 7 times y=35 4 times z=36 35 add 13 minus 36 35 add 13=48 48 minus 36=12 Answer=12

Answer 2

7y + 13 - 4z
We have y=5 and z =9.
Everything you need to do is replace y by it's value, and z by it's value, and calculate following the orders of operations.
7*5 + 13 - 4*9
First, you calculate the multiplications, then you subtract and add.
35 + 13 - 36 = -1 + 13 = 12

Hope this Helps! :)