This Math quiz is called 'Algebra - Equations with Brackets' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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In these equations with brackets, you'll need to work out the value of x (or other letters such as a or b). This Algebra quiz gives you some practice at moving around letters and figures as an introduction to equations with brackets.
As you progress through the Math quiz, you get a chance to solve some equations - lucky you!
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When the 4 crosses the equals sign it changes from + 4 to - 4
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When - 16 crosses the equals sign it changes to + 16
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The correct answer could be further simplified to b = -1
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You will often find that you have a term such as 6a and you need to separate the 6 from the a in order to determine the value of a
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Removing brackets this way is referred to as 'expanding the brackets'. In this case the 5 outside of the brackets must be multiplied by BOTH the a and the - 4 that are inside the brackets
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4x - 20 = 10 and therefore 4x = 30
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16a + 112 = 128 and therefore 16a = 16
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5 x -7 = -35
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