作业帮解方程组：①3x+4y=19；x-y=4②x-y=3；2y+3（x-y）=11③x/2-y + 1/3=1；3x+2y=10
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 19:18:47
解方程组：①3x+4y=19；x-y=4②x-y=3；2y+3（x-y）=11③x/2-y + 1/3=1；3x+2y=10
解方程组：①3x+4y=19；x-y=4②x-y=3；2y+3（x-y）=11③x/2-y + 1/3=1；3x+2y=10
解方程组：①3x+4y=19；x-y=4②x-y=3；2y+3（x-y）=11③x/2-y + 1/3=1；3x+2y=10
①由x-y=4,得 x=y+4 ②将x-y=3代入2y+3(x-y)=11 ③由x/2-y+1/3=1,得
代入3x+4y=19,得 得 2y+3×3=11 则 y=1 y=x/2-2/3
3(y+4)+4y=19 由x-y=1,得 x=y+3=4 代入3x+2y=10,得
∴ y=1,则x=y+4=5 ∴ x=4,y=1 3x+2(x/2-2/3)=10
∴ x=5,y=1 x=17/6 y=3/4
X=31/7 Y=3/7 X=-2 Y=-5 X=17/6 Y=3/4
解方程组：｛4x+5(x-y)=30,4y-3(x-y)=6
解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1
解方程组x+y/3=x-y/4 2x+3y=11
解方程组3x+5(x+y)=2 3y-2(x+y)=4
解方程组,x+y/2=3x-2y=10+6x+y/4,
方程组4=x+y,8=3x-y求x,y的解
解方程组：①3x+4y=19；x-y=4②x-y=3；2y+3（x-y）=11③x/2-y + 1/3=1；3x+2y=10
3(x-y)+5(x-y)=19 4(x+y)-2(x-y)=-1解方程组是3（x+y)
解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20
解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1
解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1
解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3（x-y）=15
解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
解方程组⑴(x+y)/2-(x-y)/3=6,⑵3(x+y)=4(x-y)