4-5 Solve Multi-Step Equations, Study notes of Linear Algebra

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4-5 Solve Multi-Step Equations ere) Ps, 3G Solve)Multi-Step)jEquations ETD 1 05 have Some equations contain expressions with grouping symbols. To solve P, these equations, first expand the expression using the Distributive arentheses, lo Property. Then collect like terms if needed, and solve the equation using the Properties of Equality. must distribute Ei id get rid of 1. Solve 15(20 + a) = 420. moldy 630 Yd) = 420 Write the equation. 300+15d= 420 Distributive Property — 300 = —300 Subtraction Property of Equality 15d= 120 Simplify. 154 120m propery of Ely d= 8 Simplify. er It? Do these problems to find out. a. =3(9 CN b 5 Ye 25 gia Sa -954fo9 135 737} 60 30560 “3 ''=3 T1/S5 =-wW la RT | ot 5 (a-7)=2 O-3 (44x)=33 @5C3 Shae O-3 (4-20-33 B) 5%s)= ° (5)=2 #@-3(-|))=33 @) eas 4) 33=33