Answer:
B. 16
Step-by-step explanation:
Solve for s:
[tex] \longrightarrow[/tex] 4(2s - 1) = 7s + 12
Expand out terms of the left hand side:
[tex] \longrightarrow[/tex] 8s - 4 = 7s + 12
Subtract 7 s from both sides:
[tex] \longrightarrow[/tex] (8s - 7s) - 4 = (7s - 7s) + 12
8s - 7s = s:
[tex] \longrightarrow[/tex] s - 4 = (7s - 7s) + 12
7s - 7s = 0:
[tex] \longrightarrow[/tex] s - 4 = 12
Add 4 to both sides:
[tex] \longrightarrow[/tex] s + (4 - 4) = 4 + 12
4 - 4 = 0:
[tex] \longrightarrow[/tex] s = 12 + 4
12 + 4 = 16:
[tex] \longrightarrow[/tex] s = 16
