Solve 3x + 10 = 10(2x-5)
Multiply out the right hand side so equation becomes 3x+10=20x-50Move x's to one side and numbers to other so 17x = 60x= 60/17
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All answers ▸Solve the simultaneous equations 5x+2y=11 and x-y=-2.
There are n sweets in a bag. 6 are Orange, the rest are Yellow. Hannah takes a sweet out of the bag, and eats it, she does this twice. The Probability of Hannah eating two orange sweets is 1/3. Show that n^2 - n - 90 =0, and solve to find the value of n.
Factorise x²+5x+6.
Solve the quadratic equation x^2 + x - 20 = 0