We must use PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction
Start with the given equation.
Start by solving the brackets ( ).
This means you need to solve the parentheses ( ) first.
Multiply .
Finish solving the brackets by subtracting.
Solve the exponent next.
Multiply .
Finally, add.
1. 12=x+3 12-3=9 now try 9+3 that is 12 so x=9
2. b+0.6=-1 -1-0.6=-1.6 -1.6+0.6=-1 b=-1.6
3. a=-9
4. x=-39 I believe
5. a=-4.3
7^2 = 7x • 3
49 - 21x
-21x + 49
The value of x in the equation is 23.
<h3>How to solve equation?</h3>
46 / x = 2
The equation above have one solution because the value of x is a single value.
46 / x = 2
cross multiply
2x = 46
divide both sides by 2
2x / 2 = 46 / 2
x = 23
A value of x that makes an equation true is 23, which when substituted into the equation and simplified makes the equation turn into x = 23.
A value of x that makes an equation false is 46, which when substituted into the equation and simplified makes the equation turn into x = 46.
learn more on equation here: brainly.com/question/24964043
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