Solve for m: 150 + 75m + m/8 - m/3 = (900 - 5m/2)/12

Question

150+75m+m8m3=(9005m2)112 150+75m+\frac{m}{8}-\frac{m}{3}=(900-\frac{5m}{2})\cdot\frac{1}{12}

m=? m=\text{?}

Video Solution

Solution Steps

00:00 Solve
00:11 Open parentheses properly, multiply by each factor
00:27 We want to isolate the unknown M
00:42 We'll arrange the equation so that one side has only the unknown M
01:11 Multiply denominators to find a common denominator
01:24 Collect terms
01:31 Simplify what's possible
01:36 Isolate the unknown M
01:44 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Simplify the right-hand side.
  • Step 2: Work with fractions on the left-hand side.
  • Step 3: Solve for m m .

Let's work through each step:

Step 1: Simplify the right-hand side.
The right side of the equation is (9005m2)112 \left( 900 - \frac{5m}{2} \right) \cdot \frac{1}{12} . Distribute 112\frac{1}{12} across the terms inside the parentheses:

=9001125m2112 = 900 \cdot \frac{1}{12} - \frac{5m}{2} \cdot \frac{1}{12}

=900125m24 = \frac{900}{12} - \frac{5m}{24}

=755m24 = 75 - \frac{5m}{24}

So, the simplified equation becomes:

150+75m+m8m3=755m24 150 + 75m + \frac{m}{8} - \frac{m}{3} = 75 - \frac{5m}{24}

Step 2: Combine and simplify terms.
We will first find a common denominator for the fractions on the left side. The least common multiple of the denominators 8, 3, and 24 is 24. Convert each fraction to have this common denominator:

m8=3m24\frac{m}{8} = \frac{3m}{24} and m3=8m24\frac{m}{3} = \frac{8m}{24}.

Rewrite the left-hand side:

150+75m+3m248m24150 + 75m + \frac{3m}{24} - \frac{8m}{24}

Combine the like terms:

150+75m+(3m248m24)150 + 75m + \left(\frac{3m}{24} - \frac{8m}{24}\right)

=150+75m5m24= 150 + 75m - \frac{5m}{24}

The equation becomes:

150+75m5m24=755m24150 + 75m - \frac{5m}{24} = 75 - \frac{5m}{24}

Now add 5m24\frac{5m}{24} to both sides to eliminate the fraction:

150+75m=75150 + 75m = 75

Step 3: Solve for m m .
Subtract 150 from both sides:

75m=7515075m = 75 - 150

75m=7575m = -75

Divide both sides by 75:

m=1m = -1

Therefore, the solution to the problem is m=1 m = -1 .

Answer

1 -1