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Chapter 1: Q12. (page 24)

Solve each equation. Check your solution.

-4b+7=-12

Short Answer

Expert verified

The required answer is -4.

Step by step solution

01

Step 1- Simplify left side of the equation

Use the distributive property ab+c=ab+ac on left side the original equation.

-4b-28=-12

02

Step 2- Isolate the variable b

Perform addition of 28 on both the sides of the equation.

鈭�4b鈭�28+28=鈭�12+28鈭�4b=16

Perform division of -4on both sides of the equation.

鈭�4b鈭�4=16鈭�4b=鈭�4

03

– Check the obtained value 

Substitute the obtained value of b into the original equation and perform simplification for checking.

鈭�4鈭�4+7=?鈭�12鈭�43=?鈭�12鈭�12=鈭�12

04

Step 4- Make the conclusion

As the checking results in equal values on both the sides on substation of obtained value which means that obtained value is correct.

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