Toán Lớp 6: Bài 1:
a.(-2)^3.17+8.(-13);b.-67.(27-35)-27.(35-67);c.(-5).7-8.(-5)^2-4.(-2).
Bài 2:
a.(x-4)-(-12)=-9;b.(-12)-2.(x-3)=-30;c.x.(y-1)=-7.
Bài 3:
a.14x+13x-12x=300;b.15x-18x+13x=-4600
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Toán Lớp 6: Bài 1:
a.(-2)^3.17+8.(-13);b.-67.(27-35)-27.(35-67);c.(-5).7-8.(-5)^2-4.(-2).
Bài 2:
a.(x-4)-(-12)=-9;b.(-12)-2.(x-3)=-30;c.x.(y-1)=-7.
Bài 3:
a.14x+13x-12x=300;b.15x-18x+13x=-4600
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