1. If 2(x + 3) = 20, then x = 2. 10x-3(2x+2)=30 Please this is my midterm questions that I’m stuck at make sure it’s right please don’t be 90% sure. Thank you.

1 answer
Question:

1. If 2(x + 3) = 20, then x =
2. 10x-3(2x+2)=30
Please this is my midterm questions that I’m stuck at make sure it’s right please don’t be 90% sure. Thank you.

Answers

Step-by-step explanation:1) The question reads that 2(x+3)=20So here we are finding x We need to multiply the 2 by the ones in the bracket which is the (x+3)So 2 multiplied by x is 2xWe didn't add the x and the 3 because a variable and a number can't be added, a number and a variable which is the letter can only be multiplied.And then we also multiply 2 by 3 which is going to be;2(3)6So it's going to be;2x+6=20So now, we group like terms;2x=20-6(We have -6 because any positive number which crosses an equal sign becomes a negative and when a negative number crosses an equal sign it becomes a positive which is represented by +2x=14So now we subtracted 6 from the 20 giving us 14So now we proceed to divide both sides by 2 to obtain the value of x So 14 can be divided by 2,7 times so;x=72) So this question reads;10x-3(2x+2)=30With this we are also finding x So here, we multiply the -3 by the 2x and the +2So;-3×2x=-6xAnd-3×2=-6So now we have;10x-6x-6=30So here we can choose to group like terms of subtract the 6x from the 10x right away but grouping would be better so we are going to group which is going to be;10x-6x=30+64x=36So now we divide both sides by 4 to find the xand 36 can be divided by 4, 9 times.So;x=9

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