Given that ax+3x=15
1. Find the value of A when x= 3
2. Express X in terms of A
both are correct
1)
a(3) + 3(3) = 15
3a +9=15
3a=6
a=2
2)
ax +3x=15
x(a+3)=15
x=15/(a+3)
thanks
To find the value of A when x = 3, we can substitute the given values into the equation ax + 3x = 15 and solve for A.
1. Substituting x = 3 into the equation ax + 3x = 15:
a(3) + 3(3) = 15
3a + 9 = 15
Next, we can simplify the equation:
3a = 15 - 9
3a = 6
Finally, solving for A:
a = 6 / 3
a = 2
Therefore, when x = 3, the value of A is 2.
2. To express X in terms of A, we can rearrange the equation ax + 3x = 15 to solve for x.
Starting with the equation ax + 3x = 15:
(a + 3) x = 15
Dividing both sides by (a + 3):
x = 15 / (a + 3)
So, X can be expressed in terms of A as:
x = 15 / (a + 3)
This means that x is equal to 15 divided by the sum of A and 3.