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定义新运算 * 为a*b=ab+2a,若(a*x)+(x*3)=14,则x的值是?(要过程)
人气:300 ℃ 时间:2020-01-26 14:06:57
解答
(a*x)=ax+2a
(x*3)=3x+6
(a*x)+(x*3)=(ax+2a)+(3x+6)
(ax+2a)+(3x+6)=14
ax+3x+2a+6=14
x(a+3)=8-2a
x=2(4-a)/(a+3)
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