Уравнение -3 (x+3)=-12
0,02x+1,38=-0,02

-3(x+3)=-12     -3x+9=-12-3x=-12-9-3x=-21x=-21:(-3)x=7------------------0.02x+1.38=-0.020.02x=-0.02-1.380.02x=1.4x=1.4:0.02x=70