计算(1)4×(-3)²+5×(-3)+7 (2)(-5)²-5²-2/3³+(2/3)³解方程(1)2/3(x-3)=1/2x-1 (2)3(x-1)-2(3/2x-1)=4(x-1)
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计算(1)4×(-3)²+5×(-3)+7 (2)(-5)²-5²-2/3³+(2/3)³解方程(1)2/3(x-3)=1/2x-1 (2)3(x-1)-2(3/2x-1)=4(x-1)
计算(1)4×(-3)²+5×(-3)+7 (2)(-5)²-5²-2/3³+(2/3)³
解方程(1)2/3(x-3)=1/2x-1 (2)3(x-1)-2(3/2x-1)=4(x-1)
计算(1)4×(-3)²+5×(-3)+7 (2)(-5)²-5²-2/3³+(2/3)³解方程(1)2/3(x-3)=1/2x-1 (2)3(x-1)-2(3/2x-1)=4(x-1)
计算(1)4×(-3)²+5×(-3)+7
= 108-15+7
=100
(2)(-5)²-5²-2/3³+(2/3)³
=25-25-2/27+8/27
=6/27
=2/9
解方程(1)2/3(x-3)=1/2x-1
4(x-3)=3x-6
4x-12=3x-6
x=6
(2)3(x-1)-2(3/2x-1)=4(x-1)
3x-3-3x+2=4x-4
4x=-5
x=-5/4