Evaluate
7x_{3}-1.8
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7x_{3}-1.8
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3+7x_{3}-2.4-\left(4.5-2.1\right)
Divide 150 by 50 to get 3.
0.6+7x_{3}-\left(4.5-2.1\right)
Subtract 2.4 from 3 to get 0.6.
0.6+7x_{3}-2.4
Subtract 2.1 from 4.5 to get 2.4.
-1.8+7x_{3}
Subtract 2.4 from 0.6 to get -1.8.
3+7x_{3}-2.4-\left(4.5-2.1\right)
Divide 150 by 50 to get 3.
0.6+7x_{3}-\left(4.5-2.1\right)
Subtract 2.4 from 3 to get 0.6.
0.6+7x_{3}-2.4
Subtract 2.1 from 4.5 to get 2.4.
-1.8+7x_{3}
Subtract 2.4 from 0.6 to get -1.8.
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