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7.6a-3-\left(0.5-0.2a-1.4\right)
Use the distributive property to multiply -0.2 by a+7.
7.6a-3-\left(-0.9-0.2a\right)
Subtract 1.4 from 0.5 to get -0.9.
7.6a-3-\left(-0.9\right)-\left(-0.2a\right)
To find the opposite of -0.9-0.2a, find the opposite of each term.
7.6a-3+0.9-\left(-0.2a\right)
The opposite of -0.9 is 0.9.
7.6a-3+0.9+0.2a
The opposite of -0.2a is 0.2a.
7.6a-2.1+0.2a
Add -3 and 0.9 to get -2.1.
7.8a-2.1
Combine 7.6a and 0.2a to get 7.8a.
7.6a-3-\left(0.5-0.2a-1.4\right)
Use the distributive property to multiply -0.2 by a+7.
7.6a-3-\left(-0.9-0.2a\right)
Subtract 1.4 from 0.5 to get -0.9.
7.6a-3-\left(-0.9\right)-\left(-0.2a\right)
To find the opposite of -0.9-0.2a, find the opposite of each term.
7.6a-3+0.9-\left(-0.2a\right)
The opposite of -0.9 is 0.9.
7.6a-3+0.9+0.2a
The opposite of -0.2a is 0.2a.
7.6a-2.1+0.2a
Add -3 and 0.9 to get -2.1.
7.8a-2.1
Combine 7.6a and 0.2a to get 7.8a.