Mathematics
Grade 7
15 min
Find a value using two-variable equations
Find a value using two-variable equations
Tutorial Preview
1
Find y if y = 2x + 5 and x = 3.
2
Find c if c = -4a + 10 and a = 2.
3
A plumber charges $50 plus $20 per hour. Find the cost for 3 hours.
Sample Practice Questions
Easy
If y = 3x + 1, what is the value of y when x = 2?
0.6
1.7
2.8
3.9
Easy
If a = 5b + 2, what is the value of a when b = 3?
0.17
1.10
2.20
3.15
Easy
If c = 2d + 10, what is the value of c when d = 4?
0.16
1.18
2.20
3.22
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