Solve this pair of simultaneous equations:
\[3x + y = 7\]
\[3x - y = 5\]
\[x = 2,\,y = 4\]
\[x = 2,\,y = 1\]
\[x = 1,\,y = 4\]
\[3x + 2y = 4\]
\[2x + y = 3\]
\[x = 1,\,y = 1\]
\[x = 2,\,y = - 1\]
\[5x + 2y = 20\]
\[x + 4y = 13\]
\[x = 3,\,y = 3\]
\[x = 2,\,y = 5\]
\[x = 3,\,y = \frac{5}{2}\]
Substitute y = 4 into the following equation: 4x + 2y = 52. What is the value of x?
x = 11
x = 10
x = 9
Two simultaneous equations are given as 2x + y = 5 and 3x + y = 7. Find the value of x and y.
x = 1, y = 2
x = 2, y = 1
x = 1, y = 1
Two simultaneous equations are given as: 6x - 2y = 15 and 4x + 3y = -3. Which of the following can NOT be used to solve the equations?
12x - 4y = 30 and 12x + 9y = – 9
12x - 6y = 36 and 4x + 6y = 3
18x - 6y = 45 and 8x + 6y = – 6
Two sandwiches and a juice cost £3.40. Four sandwiches (s) and three juices (j) cost £7.20. Which simultaneous equations show this information?
2s + 4s = 3.40 and j + 3j = 7.20
2s + j = 7.2 and 4s + 3j = 3.4
4s + 3j = 7.2 and 2s + j = 3.4
Two sandwiches and a juice cost £3.40. Four sandwiches and three juices cost £7.20. What is the cost of a juice?
£0.50
£0.40
£0.30
Two sandwiches and a juice cost £3.40. Four sandwiches and three juices cost £7.20. What is the cost of a sandwich.
£1
£1.25
£1.50
Two simultaneous equations are given as y = x + 4 and y = x2 + 4x. Which of these are NOT a solution point for the equations?
x = -1 and y = 3
x = -4, y = 0
x = 1, y = 5