Answer:
y = 0
Step-by-step explanation:
[tex] - 7 + 21y + 23 = 16[/tex]
[tex] - 7 + 23 =( 23 - 7) = 16[/tex]
[tex]16 + 21y = 16[/tex]
[tex]21y = 0[/tex]
[tex]y = 0 \div 21[/tex]
[tex]\boxed{\green{y = 0}}[/tex]
[tex]21y + (23 - 7) = 16[/tex]
[tex]21y + 16 = 16[/tex]
[tex]21y = 16 - 16[/tex]
[tex]y = \frac{0}{21} [/tex]
[tex]y = 0[/tex]
