Group the like terms together in expression $3 z - x - 2 z + 4 x$ .

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Solution

Step I : For finding the terms in expression :
We know that an algebraic expression is formed by a single term or by a group of terms.
In expression $3 z - x - 2 z + 4 x$
Terms $= 3 z, - x, - 2 z, 4 x$
Step II : For finding like terms in expression :
Like terms are terms that contain the same variable which is raised to the same powers.
Like terms $= (3 z, - 2 z); (- x, 4 x)$
Hence, the like terms $= (3 z, - 2 z); (- x, 4 x)$ .

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