Verified answer

Ответ:

[tex]\pmb {x =1 \dfrac{3212}{3337} }[/tex]

Пошаговое объяснение:

[tex]\sf 0,13 \cdot (9,8 x + 5,4) + 1,2 (4,5 x + 1 ) = 15 \\\\ 1,274 x+0,702 + 5,4x + 1,2 = 15 \\\\ 6, 674x + 1,902 = 15 \\\\\ 6,674 x = 15 - 1,902 \\\\ 6,674 x = 13,098 \\\\x = \cfrac{13,098}{6,674 } = \cfrac{13098}{6674} = \cfrac{2 \cdot 6549}{2\cdot 3337} = \cfrac{6549}{3337} = 1\cfrac{3212}{3337}[/tex]