А) 0,1(х+3)=9; 0,1х+0,3=9; 0,1х=8,7; х=87.
Б)х+1/3х=12; 4/3х=12; х=9.
В)1,5(4-х)=6; 6-1,5х=6; 1,5х=0; х=0.
Г)(6+2х)+х=9; 6+2х+х=9; 6+3х=9; 3х=3; х=1.
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Answers & Comments
А) 0,1(х+3)=9; 0,1х+0,3=9; 0,1х=8,7; х=87.
Б)х+1/3х=12; 4/3х=12; х=9.
В)1,5(4-х)=6; 6-1,5х=6; 1,5х=0; х=0.
Г)(6+2х)+х=9; 6+2х+х=9; 6+3х=9; 3х=3; х=1.