4(0,7x+3)-5x ПРИ x=1,5

Question

4(0,7x+3)-5x ПРИ x=1,5

Answer 1

4(0,7х+3)-5х=|х=1,5|=2,8х+12-5х=-2,8х+12=(-2,8*1,5=)-4,2+12=7,8

Answer 2

2.8х+12-5х= 2.8× 1.5+12-5×1.5= 4.2+12-7.5= 8.7