Answer:
7
Step-by-step explanation:
7 * 5 = (x * 2) + (7*3)
1. Multiply 7 and 5 to know what you need to equal
2. muliply 7 and 3 to see how much you are adding
[tex]35= (x*2)+21[/tex]
3. subtract 21 on both sides
[tex]35-21=(x*2) +21-21\\14=x*2[/tex]
4. divide 14 by 2.
if you don't know how to divide...
1*2=2
2*2
2*3
2*4
2*5
2*6
2*7
Goes up by 2, add 2
*=mulitply
x=blank or variable
