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[tex](6ab + a - 4)-(ab-1) \\ \\ 6ab + a - 4 - ab + 1 \\ \\ (6ab - ab) + a - 4 + 1 \\ \\ 5ab + a - 4 + 1 \\ \\ 5ab + a - 3 \\ \\ Answer: \fbox {5ab + a - 3}[/tex]
☆Let's simplify step-by-step!☆
☆Question you asked:
6ab+a−4−(ab−1)

☆Distribute the Negative Sign:
6ab+a−4+−1(ab−1)
6ab+a+−4+−1ab+(−1)(−1)
6ab+a+−4+−ab+1

☆Combine Like Terms:
6ab+a+−4+−ab+1
(6ab+−ab)+(a)+(−4+1)

☆Answer:
5ab+a+−3

☆I hope this helps!☆