CPM Homework Help : CCA2 Problem 1-52

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1-52.

Solve each of the following equations.

$3.9x−2.1=$ $11.2x+51.7$
Step 1(a):
Isolate all $x$ 's on the same side.
$3.9x−2.1=11.2x+51.7$
$−7.3x−2.1=51.7$
Step 2(a):
Isolate all constants on the same side.
$−7.3x=53.8$
Answer(a):
Divide by the coefficient of $x$ .
$x\approx−7.37$

$\frac{1}{5}x−2=$ $\frac{13}{25}-0.7x$
Hint (b):
Notice that both fractions in this problem can be changed to exact decimal values.
Answer (b):
$x=2.8$

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