Question

Уравнения 14х-х-28=167. 8а+7а+15 =420. 9*(152-7х)=927. 16у-7у+38 = 3683

Answer 1

$14x - x - 28 = 167 \\ 13x = 195 \\ x = 15$
$8a + 7a + 15 = 420 \\ 15a = 405 \\ a = 27$
$9 \times (152 - 7x) = 927 \\ 152 - 7x = 103 \\ 7x = 49 \\ x = 7$
$16y - 7y + 38 = 3683 \\ 9y = 3645 \\ y = 405$

Answer 2

14х-х-28=167
13х-28=167
13х=167+28
13х=195
Х=16

8а+7а+15=420
15а+15=420
15а=420-15=405
А=27

9*(152-7х)=927
1368-63х=927
63х=441
Х=7

16у-7у+38=3683
9у+38=3638
9у=3638-38=3600
У=3600:9=400