[tex]\\ \sf\longmapsto 7+7x=100[/tex]
[tex]\\ \sf\longmapsto 8x=100[/tex]
[tex]\\ \sf\longmapsto x=\dfrac{100}{8}[/tex]
[tex]\\ \sf\longmapsto x=12.96[/tex]
Hope it helps
Answer:
50
Step-by-step explanation:
