Mathematics, 11.08.2021 01:50, estrellagutierrez12

Find the error in the solution, and then solve it correctly. 7x + 12 + 3x = 8
7x + 12 = 5
7x = -7
x= -7/7

3х (or 3) was subtracted from the left side, but 3 (or 3x) was subtracted from the
right side. The Subtraction Property of Equality states that you can subtract the
same number from each side and the equation will remain true. But 3x and 3 are
not the same number (unless x is 1 ( or 0 or 2)
X =

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:10, paaoolav

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Answers: 2

continue

Mathematics, 21.06.2019 21:30, jamarengle2

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1

Answers: 1

continue

Mathematics, 21.06.2019 22:00, connorhanratty6487

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Answers: 1

continue

Mathematics, 21.06.2019 23:10, funmi5504

Proportions in triangles solve for x

Answers: 3

continue

Do you know the correct answer?

Find the error in the solution, and then solve it correctly. 7x + 12 + 3x = 8
7x + 12 = 5