Question

Решите уравнения 5х-10=2 х+8 10х-3(3х+2)=2х+8 2(х+3)-13(4+2х=-53-25х

Answer 1

1)5х-10=2х+8 5х-2х=8+10 3х=18/:3 х=6 2)10х-3(3х+2)=2х+8 10х-9х-6=2х+8 10х-9х-2х=8+6 -1х=14/:(-1) х=-14 3)2(х+3)-13(4+2х)=-53-25х 2х+6-52-26х=-53-25х 2х-26х+25х=-53-6-52 1х=-111/:1 х=-111 Х=

Answer 2

1)5х-2х=8+10
3х=18
х=18÷3
х=6
5×6-10=2×6+8
20=20
2)10х-9х-6=2х+8
х-2х=8+6
-х=14
х=-14
10×(-14)-3 (3×(-14)+2)=2×(-14)+8
-140+120=-20
-20=-20
3)2х+6-52-26х=-53-25х
-24х+25х=-53+46
х=-7
2(-7+3)-13(4+2×(-7))=-53-25×(-7)
-8+130=-53+175
122=122