Question

решите уравнение г) x-1=0,4x - 2,5

Answer 1

x-0.4x=1-2.5
0.6x=-1.5
x=-1.5/0.6=
$- (3 \div 2) \div (3 \div 5) = - (3 \div 2) \times (5 \div 3) = - 5 \div 2 = - 2.5$
x=-2.5