Solve algebraically for a and b: 6a+b=16, 5a-2b=19
Multiply equation 1) by 2 : 12a+2b=32. There are alternate signs of b and so therefore add the equations together: 17a=51. Solve for a: a=3. Sub a into one of the equations to find b: 5*3-2b=19b=-2. The final answer is therefore: a=3 and b=-2
SS
Related Maths GCSE answers
All answers ▸How does differentiation work?
What is £23 increased by 4%?
A is (2, 12) and B is (8, 2) Calculate the midpoint of AB.
There are 300 students at a school who have been asked to attend assembly. 1/10 students are sat on chairs, 85% of students are sat on the floor, the rest do not attend assembly. How many students did not attend assembly?