Exercise 1.5.1 in Guillemin and Pollack

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Suppose that $A: \mathbb{R}^k \rightarrow \mathbb{R}^n$ is a linear map and $V$ is a vector subspace of $\mathbb{R}^n$. Check that $A$ is transversal to $V$ means just $A(\mathbb{R}^k) + V = \mathbb{R}^n$.

Could anyone give me a hint on how to prove it?