Answer:
2yx + xz - 7x
Explanation:
x(2y + z - 7)
distribute
(x * 2y) + (x * z) + (x * -7)
2yx + (x * z) + (x * -7)
2yx + xz + (x * -7)
2yx + xz + -7x
2xy+xz-7x
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