Solving two-step linear equations using addition and subtraction: ax + b = c
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Now Playing:Solve linear equations using addition and subtraction – Example 1a
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Find x in the equation modelled by each diagram.
Find x in the equation modelled by algebra tiles.
Solve.
7x+9=21
98−2x=14
−35=6x+49
−4x−11=109
The total admission fee of an aquarium for 30 students is $240 after a group discount of $3 for each person. What is the original admission fee before the discount?
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In this section, we will look at linear equation questions which involve two kinds of operations: addition and subtraction. We will deal with two-step linear equations modeled by diagrams as a start. Then, we will learn how to solve algebraic equations and related word problems.
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