Toán Lớp 6: Tìm x biết:
A) (2x – 10) – 2 × 3^2 = 6
B) (3^2 – x) ×2^2 × 3-5= 43
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Toán Lớp 6: Tìm x biết:
A) (2x – 10) – 2 × 3^2 = 6
B) (3^2 – x) ×2^2 × 3-5= 43
Comments ( 2 )
b, x=5
giải thik:
a,( 2x – 10 ) – 2 × 3^2 = 6
( 2x -10 ) – 18 =6
2x-10 = 24
2x = 24+10
2x = 34
x = 34:2
x = 7
b,(3^2 – x) ×2^2 × 3-5= 43
(3^2 – x) ×2^2 × 3 = 48
(3^2 – x) ×2^2 = 48:3
(3^2 – x) ×2^2 = 16
(3^2 – x) =16:2^2
x = 3^2 -4
x = 9-4
x = 5
Chúc bạn học tốt >_<