回答:
说明:
因此,
=
=
=
=
=
回答:
答案是
说明:
乘
什么是4个连续的奇数整数,其总和是64?
13,15,17,19设第一个数字是颜色(红色)(x请记住,2的值中的结果奇数整数不同:。其他数字是颜色(红色)(x + 2,x + 4,x + 6色(橙色)(rarrx +(x + 2)+(x + 4)+(x + 10)= 64删除括号rarrx + x + 1 + x + 2 + x + 4 + x + 6 = 64 rarr4x + 12 = 64 rarr4x = 64-12 rarr4x = 52颜色(蓝色)(rArrx = 52/4 = 13所以第一个整数是13然后其他整数是(x + 2),(x + 4),(x + 6) )那是颜色(绿色)(15,17,19
什么是4x-3y = 2的四个解,使用x = -1,1,0,2?
Y = -2,2 / 3,-2 / 3,2 x = -1 4(-1)-3y = 2 -4-3y = 2 3y = -6 y = -2 x = 1 4(1) - 3y = 2 4-3y = 2 3y = 2 y = 2/3 x = 0 4(0)-3y = 2 -3y = 2 y = -2 / 3 x = 2 4(2)-3y = 2 8- 3y = 2 3y = 6 y = 2
什么是4x-3y = -17的拦截?
颜色(紫罗兰色)(“x-intercept”= -17 / 4,颜色(紫色)(“y-intercept”= 17/3 4x-3y = -17当x = 0,-3y = -17“或”y时= 17/3:。颜色(紫色)(“y-截距”= 17/3类似地,当y = 0时,4x = -17“或”x = -17/4:。颜色(紫色)(“x-拦截“= -17/4