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| SELECT PAGE NO. | SELECT PROBLEM NO. FOR THE PAGE |
| PAGE: 264 | SET: Exercises | PROBLEM: 22 |
The equations are 
.
Equation (1)
Equation (2)
Solve the first equation 
.
According to addition property of equality: Add 3y to each side.
(Apply additive identity property: 
)
(Apply additive inverse property: 
)
(Apply additive identity property: 
)
Substitute 
in equation (2).
(Multiply: 
)
(Add: 
) 
According to division property of equality: Divide each side by 10.
(Cancel common terms)
(Divide: 
)
Substitute 
in equation .
(Multiply: 
)
The solution is 
.
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