Answer:
b₁ = [tex]\frac{2A-hb_{2} }{h}[/tex]
Step-by-step explanation:
Given
A = [tex]\frac{1}{2}[/tex] h(b₁ + b₂) ( multiply both sides by 2 to clear the fraction )
2A = h(b₁ + b₂) ← distribute
2A = hb₁ + hb₂ ( subtract hb₂ from both sides )
2A - hb₂ = hb₁ ( isolate b₁ by dividing both sides by h )
[tex]\frac{2A-hb_{2} }{h}[/tex] = b₁
