Toán Lớp 7: Tìm x,y,z biết
a.|2x+1|+|3y+5|=0
b.|2x-1|+|1-2x|=8
c. $(7y-x)^{2020}$ +|5-11x|=0
d.|3x-5|+ $(2y+5)^{208}$-$(4z-3)^{20}$ ≤0
e.$(3x-1)^{6}$=$(3x-1)^{4}$
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Toán Lớp 7: Tìm x,y,z biết
a.|2x+1|+|3y+5|=0
b.|2x-1|+|1-2x|=8
c. $(7y-x)^{2020}$ +|5-11x|=0
d.|3x-5|+ $(2y+5)^{208}$-$(4z-3)^{20}$ ≤0
e.$(3x-1)^{6}$=$(3x-1)^{4}$
Comments ( 1 )
2 câu a và c thôi nhé
