8x=84
3(10.5)+14+5(10.5)-8
31.5+14+72.5-8
This ends up equaling 110, but it needs to equal 90. What am I doing wrong?
I have no clue what your expression is or what you are doing, so I will just complete your arithmetic
3(10.5)+14+5(10.5)-8
= 31.5 + 14 + 52.5 - 8
= 90
3(10.5)+14+5(10.5)-8
31.5+14+72.5-8
31.5 + 14 + 52.5 - 8 = 90
Did you subtract the 8?
The middle line has a typo. It should be
31.5 + 14 + 52.5 - 8
To solve the equation 8x = 84, we need to isolate the variable x. We can do this by dividing both sides of the equation by 8:
8x / 8 = 84 / 8
x = 10.5
Now, let's simplify the expression 3(10.5) + 14 + 5(10.5) - 8 step by step:
First, multiply 3 by 10.5:
3(10.5) = 31.5
Next, multiply 5 by 10.5:
5(10.5) = 52.5
Now, let's substitute the values we obtained back into the expression:
31.5 + 14 + 52.5 - 8
Combine the like terms:
31.5 + 52.5 + 14 - 8
Now, add the numbers together:
31.5 + 52.5 = 84
84 + 14 = 98
Finally, subtract 8:
98 - 8 = 90
From the steps and calculations, it appears that the correct result should be 90, not 110. Double-check all the calculations and ensure that there are no errors in the computations.