7x-x = 521:519+3 . 22 - 70=52 + 3 . 4 - 1 = 25 + 3 . 4 - 1 = 25 + 12 - 1 = 36
7x - x = 6x = 36
x= 36 : 6 = 6
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7x-x = 521:519+3 . 22 - 70=52 + 3 . 4 - 1 = 25 + 3 . 4 - 1 = 25 + 12 - 1 = 36
7x - x = 6x = 36
x= 36 : 6 = 6
7x-x=521:519+3.22-70
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tim x
7x-x=5^21:5^19+3.2^2-7^0
7x-x=521:519+3.22-70
l) 7x+x=521:519+3.22-70
7x-x= 521:519+3.22.70
7x-x=521:519+3.22-70
Bài 4:tìm x
a.7x-x=5^21:5^19+3.2^2.7
b.11x-7x+3^4:3^3=5^4+2x
c.75-5.(x-3)^3=700
d.3.(2x-1)^2=75
e.3^x+3^x+2=270
f.3^x-3-3^2=2.3^2
Cảm ơn các bản !
9x-1=9
7x-x=521:519+3.22-70
a.7.x-x=5 mũ 21:5 mũ 19+3.2 mũ 2-7 mũ 0
b.7x-2x=6 mũ 17:6 mũ 15+44:11