Expand the brackets and simplify: 7(2x+3y)-x(14-y)

= 14x+21y-14x+xy

=y(21+x)

IA

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Expand the brackets: (x-3)(x+4)


Find the gradient of the line on which the points (1,3) and (3,4) lie and find the y-coordinate of the line at x = 7.


Solve 7x - 14 = 4x + 7


2x + 5y =33 x+3y = 19