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Review: solving equations

Lessons 58 · 1 lessons · M.A. Mirzaahmedov, A.A. Rahimqoriyev, Sh.N. Ismailov, M.A. To‘xtaxodjayeva. Mathematics Grade 6, 2nd edition. O‘qituvchi NMIU, Tashkent, 2017
Answers are for parents and teachers.
1
Solve 7x − 4 = 3x + 20.
2
Solve 3(x + 4) = 21.
3
Solve (3/4)x = 9.
4
Multiplying a number by 5 and adding 8 gives 43. Find the number.
5
Write an equation: “half of a number plus 6 is 15”. Solve it.