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Reteaching 7-3
Multi-Step Equations With Fractions and Decimals
Solve 0.25x 2 0.4 5 1.6
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You can clear the decimals first. Since 0.25 is the decimal with the greatest
25
number of decimal places and 0.25 5 100
, multiply each side by 100.
0.25x 2 0.4 5 1.6
100(0.25x 2 0.4) 5 100(1.6)
Multiply each side by 100.
25x 2 40 5 160
Distribute and simplify.
25x 2 40 1 40 5 160 1 40
Add 40 to each side.
25x 5 200
Simplify.
25x
25
5 200
25
x58
Divide each side by 25.
Simplify.
Solve each equation.
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1. 0.8x 1 2.1 5 5.3
x5
3. 2.7n 1 4.1 5 36.5
n5
5. 0.7b 1 6 2 0.3b 5 6.8
b5
Pre-Algebra Chapter 7
2. 0.5k 2 3.4 5 0.1
k5
4. 0.96m 2 1.8m 5 212.6
m5
6. 1.4a 1 3.5a 2 4.3 5 44.7
a5
Lesson 7-3 Reteaching
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