4x+2x+8x+7x=42 x=?

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4x+2x+8x+7x=42x=?4x+2x+8x+7x=42x=?4x+2x+8x+7x=42x=?x=24x+2x+8x+7x=42即(4+2+8+7)x=42即21x=42即x=24x+2x+8

4x+2x+8x+7x=42 x=?
4x+2x+8x+7x=42 x=?

4x+2x+8x+7x=42 x=?
x=2

4x+2x+8x+7x=42 即(4+2+8+7)x=42 即21x=42 即x=2

4x+2x+8x+7x=42
21x=42
x=2