Question

If (–3, 4) is the solution of the equations 3ax + 4y = –2, 2x + by = 14 then a, b are ​

Answer 1

Answer:

a = 2 and b = 5

Step-by-step explanation:

As (- 3, 4) is the solution, it must satisfy the given conditions.

For 3ax + 4y = - 2:

→ 3a(-3) + 4(4) = - 2

→ - 9a + 16 = - 2

→ 9a = 16 + 2

→ 9a = 18

→ a = (18/9) = 2

For 2x + by = 14:

→ 2(-3) + b(4) = 14

→ - 6 + 4b = 14

→4b = 14 + 6

→ b = (20/4) = 5

Answer 2

Answer:

Step-by-step explanation:

⊕  (a)x+y=-1 ; 2x-3y =-5

⊕  2+(-3) = -1 ; (2×2)-(3×-3) = -5

⊕ 2+(-3) = -1 ; 4 -(-9)= -5

⊕ (b)2x+5y =-11 ; 4x+10y =-22

⊕ (2×2)+(5×-3) =-11 ; (4×2)+(10×-3) =-22

⊕ 4+(-15) =-11 ; 8+(-30) =-22 [✓]

Hope it helps.