2/7(1.4a-3 1/2b)-1.2(5/6a-0.5b)

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вопрос

To simplify this expression, we will distribute the coefficients to each term within the parentheses:

2/7(1.4a) - 2/7(3 1/2b) - 1.2(5/6a) + 1.2(0.5b)

Next, we will simplify each term:

(2/7)(1.4a) = 0.4a
(2/7)(3 1/2b) = (2/7)(7/2)b = 1b = b
(1.2)(5/6a) = 6/5(5/6)a = a
(1.2)(0.5b) = 0.6b

Therefore, the simplified expression is:

0.4a - b - a + 0.6b = -0.6a + 0.4b