Solve and verify your result (i) 4(1-3x)-2(x-4)=2(-8x+5) (ii) x-(4-x)=3(x-4)-4
Answers
Answer:
i) -1 , ii) 12
Step-by-step explanation:
i) Solve:
4(1-3x)-2(x-4) = 2(-8x+5)
4 -12x -2x +8 = -16x +10
-12x -2x +16x = 10 -4 -8
2x = -2
x = -2/2
= -1
Verification: (substitute x= -1)
4(1-3x)-2(x-4) = 2(-8x+5)
4(1-3*-1)-2(-1-4) = 2(-8*-1+5)
4(1+3) -2(-5) = 2(8+5)
4*4 +10 = 2*13
16+10 = 26
26=26
ii) Solve:
x-(4-x) = 3(x-4)-4
x -4 +x = 3x -12 -4
2x -4 = 3x -16
2x -3x = -16 +4
-x = -12
x = -12/-1
12
Verification: (substitute x = 12)
x-(4-x) = 3(x-4)-4
12-(4-12) = 3(12-4)-4
12 -(-8) = 3(8)-4
12 +8 = 24-4
20 = 20