a) 13-(40-x)=35
b) 14-3*(5-x)=8
c) (3x-2)*(5+x)=0
d) (3x-6)*3=3^4
a) 13-(40-x)=35 b) 14-3*(5-x)=8 c) (3x-2)*(5+x)=0 d) (3x-6)*3=3^4
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a) 13-(40-x)=35
b) 14-3*(5-x)=8
c) (3x-2)*(5+x)=0
d) (3x-6)*3=3^4
Mít Mít
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King
Đáp án: a) x = 62
b) x = 3
c) x = 2/3 hoặc x = -5
d) x = 11
Giải thích các bước giải:
a) 13 – (40 – x) = 35
=> 40 – x = 13 – 35
=> 40 – x = -22
=> x = 40 – (-22) = 40 + 22 = 62
b) 14 – 3(5 – x) = 8
=> 3(5 – x) = 6
=> 5 – x = 2
=> x = 5 – 2 = 3
c) (3x – 2)(5 + x) = 0
=> 3x – 2 = 0 hoặc 5 + x = 0
=> x = 2/3 hoặc x = -5
d) (3x – 6).3 = 3^4
=> (3x – 6) = 3^4 : 3
=> 3x – 6 = 3^3
=> 3x – 6 = 27
=> 3x = 33
=> x = 11