Question

0.4(х-9)-0.3(х+2)=0.7

Answer 1

0,4(х-9)-0,3(х+2)=0,7
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=49

Answer 2

$0,4(x-9)-0.3(x+2)=0.7\\0.4x-3.6-0.3x-0.6=0.7\\0.1x-4.2=0.7\\0.1x=4.9\\x=49$