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Elanso [62]
2 years ago
5

Sam is selling T-shirts to raise money for School research project.

Mathematics
1 answer:
iren [92.7K]2 years ago
8 0

Answer:

30

Step-by-step explanation:

Equation y = 3x + 210

if y = 10x

10x = 3x + 210

or, 10x - 3x = 3x + 210 - 3x

or, 7x = 210

or, x = 210 ÷ 7

or, x = 30

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