Answer:-3
Just simplify the equation and you will x=-3
Answer:
b = 4
Step-by-step explanation:
a + 3b = 13
a + b = 5 .....multiply by -1
=============
a + 3b = 13
-a - b = -5 (result of multiplying by -1)
=============add
2b = 8
b = 8/2
b = 4 <====
a + b = 5
a + 4 = 5
a = 5 - 4
a = 1
Answer:
(3d+3) + (3d+3)
Step-by-step explanation:
Answer:
Cost of 1 goggles = $20
Cost of 1 mask = 15
Step-by-step explanation:
Given:
Cost of 2 goggles and 1 mask = $55
Cost of 1 goggles and 2 mask = $50
Find:
Cost of each goggles and mask
Computation:
Assume;
Cost of 1 goggles = a
Cost of 1 mask = b
So,
2a + b = 55.....EQ1
a + 2b = 50.......EQ2
EQ1 x 2
4a + 2b = 110 ......EQ3
EQ3 - EQ2
3a = 60
a = 20
Cost of 1 goggles = $20
a + 2a = 50
20 + 2b = 50
2b = 30
b = 15
Cost of 1 mask = 15
.
It’s the letter b) 1x10^6
