1)3,4x-4=4.8-x 2)2x+7=x+5.5 3)5-3x=2x-8 4)9.5x+2=5.7-5.6 - вопрос №345321913444822755353284952575651583116629 от sharoraupova12 23.12.2021 04:09

Question

Математика: 1)3,4x-4=4.8-x 2)2x+7=x+5.5 3)5-3x=2x-8 4)9.5x+2=5.7-5.6 5)1.5x+8=3.1x+16 6)2.9x+7.4=x+1.7

sharoraupova12 · Answer

1) 3,4x-4=4.8-x
3.4x+x=4.8+4
4.4x=8.8
x=8.8:4.4
x=2
2) 2x+7=x+5.5
2x-x=5.5-7
x=-1.5
3) 5-3x=2x-8
-3x-2x=-8-5
-5x=-13
x=-13:(-5)
x=2.6
4) 9.5x+2=5.7-5.6
9.5x=5.7-5.6-2
9.5x=-1.9
x=-1.9:9.5
x=-0.2
5) 1.5x+8=3.1x+16
1.5x-3.1x=16-8
-1.6x=8
x=8:(-1.6)
x= -5
6) 2.9x+7.4=x+1.7
2.9x-x=1.7-7.4
1.9x=-5.7
x=-5.7:1.9
x=-3