Question

-3(2.1x-4)-4.2=1.2-4.2-3

Answer 1

-6,3х+12-4,2=1,2-4,2-3
-6,3х=1,2-4,2-3+4,2-12
-6,3х=-13,8
х=2,19
Это неточный ответ то есть 2,19 это приближённый ответ

Answer 2

-3(2,1х-4)-4,2=1,2-4,2-3
-6,3х+12-4,2=1,2-4,2-3
-6,3х=-3-4,2+1,2+4,2-12
-6,3х=-1,8-12
х=-13,8:(-6,3)
х=-46/21=2 4/21

Answer 3

Let's solve the given equation step by step:

-3(2.1x - 4) - 4.2 = 1.2 - 4.2 - 3

Step 1: Distribute the -3 on the left side: -6.3x + 12 - 4.2 = -3

Step 2: Combine like terms on the left side: -6.3x + 7.8 = -3

Step 3: Move the constant term to the right side by subtracting 7.8 from both sides: -6.3x = -3 - 7.8

Step 4: Simplify the right side: -6.3x = -10.8

Step 5: Solve for x by dividing both sides by -6.3: x = -10.8 / -6.3

Step 6: Simplify the right side: x ≈ 1.71428571

Therefore, the solution to the equation is approximately x ≈ 1.71428571.