Question

решите пж уравнение :

(4, 9- x) :1, 2=3

Answer 1

$(4.9 - x) \div 1.2 = 3 \\ 4.9 - x = 3 \times 1.2 \\ 4.9 - x = 3.6 \\ 4.9 - 3.6 = x \\ x = 1.3$