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ax + b = c a, b and c are coefficient

For the given problem:

Step 1: Equation = 6x + 18 = 30

Where a = 6, b = 18 and c = 30

Step 2: Subtract 18 on both sides

6x + 18 – 18 = 30 -18; 6x = 12

Now divide by 6 on both the sides

6x / 6 = 12 / 6; x = 2

Answer: x = 2

For the given problem:

Step 1: Equation = 45x + 60 = 150

Where a = 45, b = 60 and c = 150

Step 2: Subtract 60 on both sides

45x + 60 – 60 = 150 -60; 45x = 90

Now divide by 45 on both the sides

45x / 45 = 90 / 45; x = 2

Answer: x = 2