Answer:
x = 12
Step-by-step explanation:
As you know, a right angle is 90 degrees. So the equation has to add up to 90.
Here is the equation:
7x + 6 = 90
Now, instead of doing
7 x 1
7 x 2
7 x 3... or counting up to see which equals 90 when added 6 to, here's a trick.
Step 1:
As you know, PEMDAS helps you solve an equation.
But when we need to find x, we do the <em><u>opposite.</u></em>
Now it is SADMEP or,
Subtraction
Addition
Division
Multiplication
Exponents
Parentheses (the opposite of PEMDAS)
Step 2:
Keep this in mind: When finding x, the order of operations will be the opposite.
So instead of adding 6 + 90,
You have to subtract 6 from 90
90 - 6 is 84.
Step 3:
Remember how we have to multiply the x value to seven?
Instead, we're gonna divide.
84 ÷ 7 = 12
So, x = 12!
(remember to use SADMEP and opposite of order of operations :) )
Anytime! Hope this helps :)
-jp524
