Toán Lớp 6: tìm x:
a) (x-47) -115 =0
b) (x-36);18=12
c)[(6x-72):2-84] x 28 = 5628
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Toán Lớp 6: tìm x:
a) (x-47) -115 =0
b) (x-36);18=12
c)[(6x-72):2-84] x 28 = 5628
Comments ( 2 )
a) (x-47) -115 =0
=>x-47=0+115
=>x-47=115
=>x=115+47
=>x=162
Vậy x=162
b) (x-36):18=12
=>x-36=12xx18
=>x-36=216
=>x=216+36
=>x=252
Vậy x=252
c)[(6x-72):2-84] xx 28 = 5628
=>(6x-72):2-84=5628:28
=>(6x-72):2-84=201
=>(6x-72):2=201+84
=>(6x-72):2=285
=>6x-72=285xx2
=>6x-72=570
=>6x=570+72
=>6x=642
=>x=642:6
=>x=107
Vậy x=107