Question

Решите уравнения: 1
1) 3 (х+4) +6х = 118


2) 0.18 (х-200) - 0.78х = 120


3) 7 (x-4) - 5 (6x-2) = -16x+10

Answer 1

$1) 3(x+4)+6x=118$
$3x+12+6x=118$
$3x+6x=118-12$
$9x=106$
$x=11 frac{7}{9}$

$2) 0.18(x-200) - 0.78x = 120$
$0,18x-36-0,78x=120$
$0,18x-0,78x=120+36$
$-0,6x=156$
$x=-260$

3) $7 (x-4) - 5 (6x-2) = -16x+10$
$7x-28-30x+10=-16x+10$
$7x-30x+16x=10+28-10$
$-7x=28$
$x=-4$