exam Maths Puzzle Numerical Ability

3x - 9//5y times 10y^2//7x - 21 = ??

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exam Other Question

How can i solve this? could you give me step by step advice?

Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.

- 7x + 2 + x – 10 > -3(x – 1)
write equation in slope intercept form

y+1=-7(x+1)