Question

номер 669, 670 (1 столбики)
срочно пж​

Answer 1

669.  1) 1,6(2a-7) = -3.2a + 11.2 = -3.2 * 6 + 11.2 = -19.2 + 11.2 = -8

2) -0.4(3b+4) = -1.2b-1.6 = -1.2 * 7 -1.6 = -8.4-1.6 = -10

3) -2/3(3/4 - 1.5с)=-1\2+с=-0.5+(-3.5)=-4

670.  1) -2

2) -3

3) 2    ;     32