Question

Solve the simultaneous equation 2x+4y=1 3x+5y=7b

Answer 1

Step-by-step explanation:

• 3x+5y=7b equation 1
• 2x+4y=1

2x=-4y+1

• x=(-4y+1)/2
• x=(-4y+1)/2 in equation 1

3×(-4y+1)/2+5y=7b

(-12y+3)/2+5y=7b

(-12y+3+10y)/2=7b

(-12y+3)/2=7b

-12y+3=14b

-12y=14b-3

• y=3-14b/12
• y=3-14b/12 in x=(-4y+1)/2

x=(-4×{3-14b/12}+1)/2

x=(-3+14b)/3+1/2

x=14b/3×1/2

• x=7b/3