Answer:
No.
Step-by-step explanation:
There are two different ways to do this - solve for x in the given equation or substitute the value for x and see if you get a true statement.
3x + 7 = 13 subtract 7 from both sides
3x = 6 divide by 3 on both sides
x = 2
3(3) + 7 = 13
9 + 7 = 13
16 ≠ 13
Therefore, x = 3 is not a solution for 3x + 7 = 13.
Answer:86
Step-by-step explanation
140-(16+24+5+9) 140-54 = 86
Answer:
The running club has 35 members
Step-by-step explanation:
Let
x ----> the total members of the running club
we know that
The total members of the running club multiplied by 5/7 plus 6 must be equal to 31 people
so

Solve for x




therefore
The running club has 35 members
X^2+y^2=R^2
64+36=R^2
R=10
x^2+y^2=100