Question

решите уравнение 0,4(х-9)-0,3(х+2)=0.7

Answer 1

0.4х-3.6-0.3х-0.6=0.7
0.4х-0.3х=0.7+3.6+0.6
0.1х=4.9
х=4.9:0.1
х=49