Solve these simultaneous equations: 7x+3y=84, 2x+2y=32
Make x the subject of either equation:x = (32-2y)/2;x = 16-yRepresent an equation as a function of y only: 7(16-y)+3y = 84;112-7y+3y = 84;112-4y = 84;-4y = -28; y = 7Use the value of y to determine value of x:2x = 32 - 2y;x=9
TP
Related Maths GCSE answers
All answers ▸A rectangle has an area of 20cm^2. Its length and width are enlarged by a factor of 3. Find the area of the enlarged rectangle.
How do I make calculations with percentages?
5, 11, 21, 35, 53, ... Find the nth term of this sequence.
The number of uniform spherical balls that can be produced from a given mass of lead is inversely proportional to the radius of the ball cubed. If 2744 balls can be made when the radius is 1mm, how many balls can be made when the radius is 1.4mm ?