Add 7 to both sides
3x + 12 = 7x
Subtract 3x
12 = 4x
Divide by 4
x = 3
5^2 + 12^2 = c^2
25 + 144 = c^2
169 = c^2
take the square root of both sides
+ - 13 = c
Answer: 1/90
multiply 1/10 and 1/9 across, and you get 1/90
×
= 
hope it helps!!!
Answer: Biden 2020
Step-by-step explanation: