☰ Contents · Algebra

Equations and their solutions

Lessons 8 · 1 lessons · Sh.A. Alimov, O.R. Xolmuhamedov, M.A. Mirzaahmedov. Algebra, Grade 7, revised and expanded 5th edition. O‘qituvchi NMIU, Tashkent, 2017
Answers are for parents and teachers.
1
Is -2 a root of 5x + 9 = -1?
2
Two numbers have sum 41 and one is 5 greater than the other. Find the smaller one.
3
Find the roots of x · x = 49.
4
Write and solve an equation for: “three times a number plus 4 gives 19”.