To solve for x in the proportion (x+1)/(x+3) = 15/21, we will cross-multiply.
Cross-multiplying, we get:
21(x + 1) = 15(x + 3)
Expanding the equation:
21x + 21 = 15x + 45
Subtracting 15x from both sides:
6x + 21 = 45
Subtracting 21 from both sides:
6x = 24
Dividing both sides by 6:
x = 4
Therefore, the value of x in the proportion is 4.
what is the value of x in the proportion x+1/x+3=15/21
1 answer