a/ => -12x + 60 + 21 - 7x = 15
=> -19x = -66
=> x = 66/19
b/ => 30x + 60 - 6x + 30 - 24x = 100
=> 0x = 10
=> vô nghiệm
a/ => -12x + 60 + 21 - 7x = 15
=> -19x = -66
=> x = 66/19
b/ => 30x + 60 - 6x + 30 - 24x = 100
=> 0x = 10
=> vô nghiệm
Tìm x biết: a) – 12(x – 5) + 7(3 – x) = 5 b) 30(x + 2) – 6(x – 5) – 24x =100
-12(x-5)+7(3-x)=5 30(x+2)-6(x-5)-24x=100
(x+1-5)+7(3-x)=5 30(x+2)-6(x-5)-24x=100
(x+1)+(x+3)+(x+5)+........+(x+99)=0
Tìm x biết:
a, -12 (x-5)+7(3-x) = 5
b, 30(x+2)- 6(x-5) - 24x = 100
tìm x biết:
a.-12(x-5)+7(3-x)=5
b.30(x+2)-6(x-5)-24x=100
Tìm x
a, -12.(x-5)+7.(3-x) = 15
b, 30-(x+2)-6.(x-5)-24x=100
Tìm x biết ;
a , -12.(x-5)+7.(3-x)=5
b, 30.(x+2)-6.(x-5).24x=100
Tìm x biết:
a}-12[x-5]+7[3-x]=15
b}30[x+2]-6[x-5]-24x=100
Tìm x biết :
a, -12.(x-5)+7.(3-x)=5
b, 30.(x+2)-6.(x-5)-24x=100
Tìm x biết:
a) -12.(x-5)+7(3-x)=5
b)30(x+2) -6(x-5)-24x=100