Question

Как решить пример (4х-2.8)×2.5=0.75

Answer 1

$(4x-2.8)*2.5=0.75\\4x-2.8=0.75:2.5\\4x-2.8=0.3\\4x=0.3+2.8\\4x=3.1\\x=3.1:4=0.775$